[Android] Fix grouped CollectionView grid row spacing regression

[Shalini-Ashokan]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Issue Details

On Android, grouped CollectionView with a grid (Span > 1) looked wrong in the first group’s first row. The last item in that row could look uneven (like 500 looking smaller or lower).

Root Cause

The spacing code used item position / span to find row number. But position also includes group headers, so row counting became wrong after a header.

Description of Change

The fix uses Android SpanSizeLookup.GetSpanGroupIndex(...) to get the real row/group index.
This handles headers correctly, so spacing is applied evenly and the row looks normal.

Validated the behavior in the following platforms

• Android
• Windows
• iOS
• Mac

Issues Fixed

Fixes #35700

Output ScreenShot

Before	After

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 35782

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 35782"

[dotnet-policy-service]

Hey there @@Shalini-Ashokan! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[kubaflo]

Could you manually verify if this won't regress this fix: #27093

[kubaflo]

/review -b feature/enhanced-reviewer

[Shalini-Ashokan]

Could you manually verify if this won't regress this fix: #27093

@kubaflo, I manually verified #27093, and it is working fine. This PR does not affect any existing scenarios.

35700-regression.mov

[MauiBot]

Expert Review — 1 findings

See inline comments for details.

[kubaflo]

Could you try the ai's suggestions?

[kubaflo]

/review -b feature/enhanced-reviewer -p android

[MauiBot]

Expert Review — 2 findings

See inline comments for details.

[kubaflo]

Could you please check the ai's suggestions, and check the failing tests?

[kubaflo]

/review -b feature/enhanced-reviewer -p android

[kubaflo]

/review tests

[github-actions]

Tests Failure Analysis

@Shalini-Ashokan — test-failure review results are available based on commit afdd6e0.
To request a fresh review after new comments, commits, or CI runs, comment /review tests.

Test Failure Review: No failures found - click to expand

Overall verdict: No failures found

All CI checks completed successfully. No failing, pending, or inconclusive checks were found in the GitHub status check rollup for this PR.

Failure	Verdict	Evidence
(none)	N/A	All checks passed (maui-pr build 1455953, Helix unit tests, integration tests across Windows and macOS all green)

Recommended action

No test-failure action is needed. CI is fully green.

Evidence details

• All GitHub status checks: COMPLETED / SUCCESS
• maui-pr build 1455953: SUCCESS
• Helix unit tests (Windows Debug and Release): SUCCESS
• Integration tests (AOT, Blazor, Build, MultiProject, RunOnAndroid, RunOniOS, Samples, WindowsTemplates): all SUCCESS
• No AzDO token was available; authenticated test-run APIs were not queried. Build metadata, timelines, and public logs were used.
• No AzDO build IDs from failing checks and none supplied manually.

[kubaflo]

/review -b feature/enhanced-reviewer -p android

[MauiBot]

Expert Review — 1 findings

See inline comments for details.

[MauiBot]

[major] Regression Prevention and Test Coverage - This shared screenshot test runs on all UI test platforms, but the PR only adds an Android snapshot baseline and the issue page is marked Android-only. Non-Android runs can still execute this test and fail at VerifyScreenshot() due to missing iOS/Mac/Windows baselines. Please either guard this test to Android only or add baselines for every platform where it should run.

[MauiBot]

AI Review Summary

@Shalini-Ashokan — new AI review results are available based on this last commit: afdd6e0.
Addressed the AI summary To request a fresh review after new comments or commits, comment /review rerun.

Review Sessions — click to expand

Gate — Test Before & After Fix

Gate Result: ✅ PASSED

Platform: ANDROID · Base: main · Merge base: dd5b6d2e

Test	Without Fix (expect FAIL)	With Fix (expect PASS)
🖥️ Issue35700 Issue35700	✅ FAIL — 834s	✅ PASS — 1256s

🔴 Without fix — 🖥️ Issue35700: FAIL ✅ · 834s

  Determining projects to restore...
  Restored /home/vsts/work/1/s/src/Controls/src/Core/Controls.Core.csproj (in 6.9 sec).
  Restored /home/vsts/work/1/s/src/Controls/Maps/src/Controls.Maps.csproj (in 6.84 sec).
  Restored /home/vsts/work/1/s/src/Controls/Foldable/src/Controls.Foldable.csproj (in 226 ms).
  Restored /home/vsts/work/1/s/src/Graphics/src/Graphics/Graphics.csproj (in 10 ms).
  Restored /home/vsts/work/1/s/src/Essentials/src/Essentials.csproj (in 30 ms).
  Restored /home/vsts/work/1/s/src/Core/src/Core.csproj (in 40 ms).
  Restored /home/vsts/work/1/s/src/Core/maps/src/Maps.csproj (in 25 ms).
  Restored /home/vsts/work/1/s/src/BlazorWebView/src/Maui/Microsoft.AspNetCore.Components.WebView.Maui.csproj (in 1.14 sec).
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  Restored /home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj (in 859 ms).
  1 of 11 projects are up-to-date for restore.
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
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  Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Microsoft.AspNetCore.Components.WebView.Maui/Debug/net10.0-android36.0/Microsoft.AspNetCore.Components.WebView.Maui.dll
  Controls.TestCases.HostApp -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Controls.TestCases.HostApp.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
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  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
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  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
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  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
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  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Foldable.dll
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  Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.AspNetCore.Components.WebView.Maui.dll
  Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Maps.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:09:19.11
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
  Determining projects to restore...
  Restored /home/vsts/work/1/s/src/TestUtils/src/VisualTestUtils/VisualTestUtils.csproj (in 1.43 sec).
  Restored /home/vsts/work/1/s/src/TestUtils/src/VisualTestUtils.MagickNet/VisualTestUtils.MagickNet.csproj (in 6.13 sec).
  Restored /home/vsts/work/1/s/src/Controls/tests/TestCases.Android.Tests/Controls.TestCases.Android.Tests.csproj (in 7.78 sec).
  Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.Core/UITest.Core.csproj (in 11 ms).
  Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.Appium/UITest.Appium.csproj (in 3 ms).
  Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.NUnit/UITest.NUnit.csproj (in 400 ms).
  Restored /home/vsts/work/1/s/src/Controls/tests/CustomAttributes/Controls.CustomAttributes.csproj (in 5 ms).
  Restored /home/vsts/work/1/s/src/TestUtils/src/UITest.Analyzers/UITest.Analyzers.csproj (in 2.48 sec).
  5 of 13 projects are up-to-date for restore.
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
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Test run for /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.18]   Discovering: Controls.TestCases.Android.Tests
[xUnit.net 00:00:00.70]   Discovered:  Controls.TestCases.Android.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
   NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 06/11/2026 14:04:01 FixtureSetup for Issue35700(Android)
>>>>> 06/11/2026 14:04:04 GroupedCollectionViewGridLayoutRendersCorrectly Start
>>>>> 06/11/2026 14:04:12 GroupedCollectionViewGridLayoutRendersCorrectly Stop
>>>>> 06/11/2026 14:04:12 Log types: logcat, bugreport, server
  Failed GroupedCollectionViewGridLayoutRendersCorrectly [9 s]
  Error Message:
   VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: GroupedCollectionViewGridLayoutRendersCorrectly.png (3.63% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

More info: https://aka.ms/visual-test-workflow

  Stack Trace:
     at VisualTestUtils.VisualRegressionTester.Fail(String message) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 162
   at VisualTestUtils.VisualRegressionTester.VerifyMatchesSnapshot(String name, ImageSnapshot actualImage, String environmentName, ITestContext testContext) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 123
   at Microsoft.Maui.TestCases.Tests.UITest.<VerifyScreenshot>g__Verify|13_0(String name, <>c__DisplayClass13_0&) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 477
   at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable`1 retryTimeout, Int32 cropLeft, Int32 cropRight, Int32 cropTop, Int32 cropBottom, Double tolerance) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 309
   at Microsoft.Maui.TestCases.Tests.Issues.Issue35700.GroupedCollectionViewGridLayoutRendersCorrectly() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35700.cs:line 18
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

NUnit Adapter 4.5.0.0: Test execution complete
Results File: /home/vsts/work/1/s/CustomAgentLogsTmp/UITests/TestResults/Issue35700.trx

Test Run Failed.
Total tests: 1
     Failed: 1
 Total time: 1.6399 Minutes
>>> TRX_RESULT_FILE: /home/vsts/work/1/s/CustomAgentLogsTmp/UITests/TestResults/Issue35700.trx

🟢 With fix — 🖥️ Issue35700: PASS ✅ · 1256s

(truncated to last 15,000 chars)

/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Xamarin.Android.Tasks.FastDeploy.RunInstall() [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]

Build FAILED.

/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: Mono.AndroidTools.InstallFailedException: Unexpected install output: cmd: Can't find service: package [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:  [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass105_0.<InstallPackage>b__0(Task`1 t) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010:    at Xamarin.Android.Tasks.FastDeploy.RunInstall() [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:09:42.50
* daemon not running; starting now at tcp:5037
* daemon started successfully
  Determining projects to restore...
  All projects are up-to-date for restore.
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0-android36.0/Microsoft.Maui.Graphics.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0-android36.0/Microsoft.Maui.Essentials.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0-android36.0/Microsoft.Maui.dll
  Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Maps -> /home/vsts/work/1/s/artifacts/bin/Maps/Debug/net10.0-android36.0/Microsoft.Maui.Maps.dll
  Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0-android36.0/Microsoft.Maui.Controls.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.Foldable/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Foldable.dll
  Controls.Xaml -> /home/vsts/work/1/s/artifacts/bin/Controls.Xaml/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Xaml.dll
  Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.Maps/Debug/net10.0-android36.0/Microsoft.Maui.Controls.Maps.dll
  Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Microsoft.AspNetCore.Components.WebView.Maui/Debug/net10.0-android36.0/Microsoft.AspNetCore.Components.WebView.Maui.dll
  Controls.TestCases.HostApp -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Controls.TestCases.HostApp.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Graphics -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Graphics.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Essentials -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Essentials.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Core -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
  Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Maps.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Controls.Xaml -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Xaml.dll
  Controls.Maps -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Maps.dll
  Microsoft.AspNetCore.Components.WebView.Maui -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.AspNetCore.Components.WebView.Maui.dll
  Controls.Foldable -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-android/Microsoft.Maui.Controls.Foldable.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:08:47.52
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
  Determining projects to restore...
  All projects are up-to-date for restore.
  Controls.CustomAttributes -> /home/vsts/work/1/s/artifacts/bin/Controls.CustomAttributes/Debug/net10.0/Controls.CustomAttributes.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0/Microsoft.Maui.Graphics.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0/Microsoft.Maui.Essentials.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0/Microsoft.Maui.dll
  Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
  ##vso[build.updatebuildnumber]10.0.80-ci+azdo.14347529
  Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0/Microsoft.Maui.Controls.dll
  UITest.Core -> /home/vsts/work/1/s/artifacts/bin/UITest.Core/Debug/net10.0/UITest.Core.dll
  UITest.Appium -> /home/vsts/work/1/s/artifacts/bin/UITest.Appium/Debug/net10.0/UITest.Appium.dll
  UITest.NUnit -> /home/vsts/work/1/s/artifacts/bin/UITest.NUnit/Debug/net10.0/UITest.NUnit.dll
  VisualTestUtils -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils/Debug/netstandard2.0/VisualTestUtils.dll
  VisualTestUtils.MagickNet -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils.MagickNet/Debug/netstandard2.0/VisualTestUtils.MagickNet.dll
  UITest.Analyzers -> /home/vsts/work/1/s/artifacts/bin/UITest.Analyzers/Debug/netstandard2.0/UITest.Analyzers.dll
  Controls.TestCases.Android.Tests -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
Test run for /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.12]   Discovering: Controls.TestCases.Android.Tests
[xUnit.net 00:00:00.31]   Discovered:  Controls.TestCases.Android.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
   NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 06/11/2026 14:25:11 FixtureSetup for Issue35700(Android)
>>>>> 06/11/2026 14:25:12 GroupedCollectionViewGridLayoutRendersCorrectly Start
>>>>> 06/11/2026 14:25:17 GroupedCollectionViewGridLayoutRendersCorrectly Stop
  Passed GroupedCollectionViewGridLayoutRendersCorrectly [4 s]
NUnit Adapter 4.5.0.0: Test execution complete
Results File: /home/vsts/work/1/s/CustomAgentLogsTmp/UITests/TestResults/Issue35700.trx

Test Run Successful.
Total tests: 1
     Passed: 1
 Total time: 23.4670 Seconds
>>> TRX_RESULT_FILE: /home/vsts/work/1/s/CustomAgentLogsTmp/UITests/TestResults/Issue35700.trx

📁 Fix files reverted (3 files)

• eng/pipelines/ci-copilot.yml
• src/Controls/src/Core/Handlers/Items/Android/GridLayoutSpanSizeLookup.cs
• src/Controls/src/Core/Handlers/Items/Android/SpacingItemDecoration.cs

---

UI Tests — CollectionView

Detected UI test categories: CollectionView

❌ Deep UI tests — 594 passed, 27 failed across 1 category on platform-pool agent (replaces in-process counts above).

🧪 UI Test Execution Results (deep, platform pool)

Category	Tests	Snapshot diffs
CollectionView	594/621 (27 ❌)	2 diff PNGs

❌ CollectionView — 27 failed tests

VerifyGroupIndexScrollToByIndexWithStartPositionAndVerticalList_Carrot

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithStartPositionAndVerticalList_Carrot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1838
   at System.Runtim
...

VerifyGroupItemScrollToByItemWithCenterPositionAndVerticalList_Potato

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithCenterPositionAndVerticalList_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2007
   at System.Runtime
...

VerifyGroupItemScrollToByItemWithStartPositionAndVerticalList_Carrot

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithStartPositionAndVerticalList_Carrot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1974
   at System.RuntimeM
...

VerifyScrollToByItemWithStartPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2541
   at System.RuntimeMethodHand
...

VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalGrid_Potato

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalGrid_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3597
   at System.Runtime
...

VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalGrid_Potato

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalGrid_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3170
   at System.Reflec
...

VisitAndUpdateItemsSource("Observable Collection","Add/RemoveItemsGrid",19,6)

The app was expected to be running still, investigate as possible crash
TearDown : The app was expected to be running still, investigate as possible crash
at UITest.Appium.NUnit.UITestBase.UITestBaseTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 159
   at UITest.Appium.NUnit.UITestBase.TestTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 45
   at InvokeStub_UITestBase.TestTearDown(Object, Object, IntPtr*)

--TearDown
   at UITest.Appium.NUnit.UITestBase.UITestBaseTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 159
   at UITest.Appium.NUnit.UITestBase.TestTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 45
   at InvokeStub_UITestBase.TestTearDown(Object, Object, IntPtr*)

1)    at UITest.Appium.NUnit.UITestBase.UITestBaseTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 159
   at UITest.Appium.NUnit.UITestBase.TestTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 45
   at InvokeS
...

VerifyScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2137
   at System.RuntimeMet
...

VerifyScrollToByItemWithEndPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2715
   at System.RuntimeMethodHandle
...

VerifyRemainingItemsThresholdReachedWithHorizontalList

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyRemainingItemsThresholdReachedWithHorizontalList() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3652
   at System.RuntimeMethodHandle.In
...

VerifyGroupIndexScrollToByIndexWithCenterPositionAndVerticalList_Potato

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithCenterPositionAndVerticalList_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1874
   at System.Refle
...

VerifyScrollToByIndexWithCenterPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithCenterPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2295
   at System.RuntimeMethodHa
...

HeaderFooterGridWorks

VisualTestUtils.VisualTestFailedException : 
Snapshot different than baseline: HeaderFooterGridWorks.png (2.42% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.

More info: https://aka.ms/visual-test-workflow
at VisualTestUtils.VisualRegressionTester.Fail(String message) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 162
   at VisualTestUtils.VisualRegressionTester.VerifyMatchesSnapshot(String name, ImageSnapshot actualImage, String environmentName, ITestContext testContext) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 123
   at Microsoft.Maui.TestCases.Tests.UITest.<VerifyScreenshot>g__Verify|13_0(String name, <>c__DisplayClass13_0&) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 477
   at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot(String name, Nullable`1 retryDelay, Nullable
...

VerifyGroupIndexScrollToByIndexWithCenterPositionAndHorizontalList_Tomato

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithCenterPositionAndHorizontalList_Tomato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3026
   at System.Ref
...

VerifyFlowDirectionRTLAndMeasureAllItemsWithGroupedListWhenVerticalGrid

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyFlowDirectionRTLAndMeasureAllItemsWithGroupedListWhenVerticalGrid() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 520
   at System.Reflec
...

VerifyScrollToByItemWithCenterPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithCenterPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2628
   at System.RuntimeMethodHan
...

VerifyGroupItemScrollToByItemWithMakeVisiblePositionAndVerticalList_Apricot

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithMakeVisiblePositionAndVerticalList_Apricot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1943
   at System.R
...

VerifyScrollToByItemWithMakeVisiblePositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2458
   at System.RuntimeMeth
...

VerifyGroupItemScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3241
   at System.R
...

VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndVerticalList_Apricot

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndVerticalList_Apricot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1802
   at System
...

VerifyScrollToByIndexWithStartPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2214
   at System.RuntimeMethodHan
...

VerifyScrollToByIndexWithEndPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2376
   at System.RuntimeMethodHandl
...

VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3561
   at System.RuntimeMe
...

VerifyGroupItemScrollToByIndexWithStartPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3345
   at System.Runtime
...

VerifyGroupIndexScrollToByIndexWithStartPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2918
   at System.Runtim
...

VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2810
   at System.
...

VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalList_Kiwi

System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
   at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
   at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
   at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3134
   at System.Reflecti
...

📎 Download drop-deep-uitests artifact (TRX + snapshot diffs)

---

Pre-Flight — Context & Validation

Issue: #35700 - Grouped CollectionView items not rendered properly on Android with GridItemsLayout
PR: #35782 - Fix grouped Android CollectionView GridItemsLayout spacing
Platforms Affected: Android
Files Changed: 9 implementation/automation, 3 test

Key Findings

• GitHub CLI authentication is unavailable in this environment, so issue/PR comments and check details could not be fetched; continued from local pr-review-35782 branch and existing gate result.
• The functional Android fix changes SpacingItemDecoration to compute first/last visual rows from GridLayoutManager.SpanSizeLookup.GetSpanGroupIndex() so full-span group headers/footers are included in row grouping.
• GridLayoutSpanSizeLookup now enables span index/group caches, which reduces repeated span group computations in the RecyclerView hot path.
• Added UI regression coverage for issue #35700 with an Android snapshot: GroupedCollectionViewGridLayoutRendersCorrectly in category CollectionView.

Code Review Summary

Verdict: NEEDS_CHANGES
Confidence: high
Errors: 1 | Warnings: 0 | Suggestions: 0

Key code review findings:

• ❌ src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35700.cs:18 — Shared screenshot test lacks non-Android guard; only an Android snapshot baseline was added, so non-Android UI runs can fail unless the test is restricted or platform baselines are added.

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
PR	PR #35782	Use GridLayoutManager.SpanSizeLookup.GetSpanGroupIndex() for spacing edge-row detection, plus span caches	✅ PASSED (Gate)	GridLayoutSpanSizeLookup.cs, SpacingItemDecoration.cs, UI test files	Original PR; gate already verified fail-without/pass-with-fix

---

Code Review — Deep Analysis

Code Review — PR #35782

Independent Assessment

What this changes: Android grouped CollectionView grid spacing now uses GridLayoutManager.SpanSizeLookup.GetSpanGroupIndex() instead of position / span, and enables span caches. Adds an Android screenshot UI test for issue 35700.
Inferred motivation: Group headers occupy full-span adapter positions, so raw adapter position math misidentifies visual rows after headers.

Reconciliation with PR Narrative

Author claims: Fixes Android grouped CollectionView grid row spacing regression by using real span-group indices.
Agreement/disagreement: Agree on root cause and fix direction. The added test is Android-specific but not restricted to Android.

Findings

❌ Error — Shared screenshot test lacks non-Android guard

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35700.cs:18

This shared NUnit UI test can run on iOS/MacCatalyst/Windows, but the PR only adds an Android snapshot baseline. _IssuesUITest does not use the HostApp PlatformAffected.Android metadata to skip platforms. Non-Android UI runs will fail at VerifyScreenshot(). Restrict the test to Android or add platform baselines.

Devil's Advocate

The Android handler change itself looks sound and CI check-runs visible via GitHub API are green. Existing review comments also raised the platform-baseline concern, and it still appears applicable in the current diff.

Verdict: NEEDS_CHANGES

Confidence: high
Summary: Core Android fix is reasonable, but the new shared screenshot test needs platform scoping or additional baselines before merge. Inline findings were written to CustomAgentLogsTmp/PRState/35782/PRAgent/inline-findings.json.

---

Fix — Analysis & Comparison

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
1	try-fix	Compute visual row/column in SpacingItemDecoration by locally accumulating spans from GetSpanSize(); full-span headers consume their own row	✅ Pass	1 file	Correct for the regression, but duplicates AndroidX span-group logic and adds O(n) work per decorated child
2	try-fix	Detect only first/last visual grid-line boundaries from span sizes and avoid full row index calculation	❌ Fail	1 file	Failed screenshot comparison by 1.66%; only solved collection outer edges, not internal grouped-row spacing around full-span headers
3	try-fix	Apply uniform grid half-spacing and cancel collection outer scroll-axis spacing with negative RecyclerView padding	✅ Pass	2 files	Meaningfully different, but negative padding may affect clipping, scrollbars, overscroll, and scroll positioning
PR	PR #35782	Use AndroidX GridLayoutManager.SpanSizeLookup.GetSpanGroupIndex() for visual row/column detection and enable span caches	✅ PASSED (Gate)	2 implementation files + UI test	Original PR; most robust/canonical because AndroidX owns variable-span packing behavior

Cross-Pollination

Model	Round	New Ideas?	Details
maui-expert-reviewer	2	No	NO NEW IDEAS: the PR's GetSpanGroupIndex() approach with span caches is the most robust/canonical approach for variable spans and grouped full-span headers; alternatives either duplicate AndroidX logic, miss internal row boundaries, or risk RecyclerView padding/scroll side effects.

Exhausted: Yes
Selected Fix: PR's fix — Candidate 1 and Candidate 3 passed the targeted Android regression, but neither is demonstrably better. Candidate 1 reimplements AndroidX logic less efficiently; Candidate 3 changes RecyclerView padding semantics with broader scroll/clipping risk; Candidate 2 failed the regression. The PR fix remains the best candidate.

---

Report — Final Recommendation

Comparative Report — PR #35782

Candidates compared

Candidate	Regression result	Review result	Assessment
pr	✅ Passed gate	❌ Needs changes	Best production-code approach, but the shared screenshot test lacks Android-only scoping despite only adding an Android baseline.
pr-plus-reviewer	✅ Inherits PR gate result	✅ Addresses reviewer finding	Keeps the canonical AndroidX span-group fix and scopes the new screenshot coverage to Android, eliminating the only actionable review issue.
try-fix-1	✅ Passed	⚠️ Weaker than PR	Correctly handles the regression by accumulating spans locally, but duplicates AndroidX grid span-group logic and adds O(n) work per decorated child.
try-fix-2	❌ Failed	❌ Not viable	Failed the screenshot comparison because it only fixed collection outer-edge detection and missed internal grouped-row spacing around full-span headers.
try-fix-3	✅ Passed	⚠️ Higher risk	Passed the targeted Android test, but relies on negative RecyclerView padding, which has broader clipping, scrollbar, overscroll, and scroll-positioning risk.

Ranking

1. pr-plus-reviewer — Same robust production fix as the PR, with the screenshot-test platform issue corrected.
2. pr — Correct and canonical Android implementation, but still carries a UI-test reliability problem.
3. try-fix-1 — Functionally passes, but reimplements framework span grouping less efficiently.
4. try-fix-3 — Functionally passes, but changes RecyclerView padding semantics and has broader regression risk.
5. try-fix-2 — Failed the required regression test and must rank below passing candidates.

Winner

pr-plus-reviewer is the single winning candidate. It uses AndroidX GetSpanGroupIndex() for variable-span grouped grids, keeps the PR's span caching optimization, and applies the expert review feedback by limiting the new screenshot test to the only platform with a baseline and affected behavior.

---

Future Action — review latest findings

No alternative fix was selected for this run. Review the session findings and CI results before merging.