[iOS] Fix Editor losing scrollability after rotation when CharacterSpacing is applied

[Vignesh-SF3580]

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 iOS, when an Editor has CharacterSpacing applied through a Slider, the Editor becomes scrollable once the content exceeds its frame size. After rotating the device (portrait → landscape → portrait), the Editor loses scrollability because a re-measurement cascade expands it to the full content height.

Regression PR: #30629

Root Cause

PR #30629 added ValidateSafeArea() to MauiView.LayoutSubviews, which calls InvalidateConstraintsCache() during rotation. This clears the measurement cache (_lastMeasuredSize = null), causing HasBeenMeasured() = false and needsMeasure = true for Pages.
As a result, a full re-measurement cascade occurs, where the Editor is measured with infinite height. SizeThatFits then returns the full content height (for example, 134px), causing the Editor to grow to fit its content and lose its scrollable behavior.

Description of Change

Updated EditorHandler.GetDesiredSize to cap the measured height to the current frame height when the Editor content exceeds its frame (scrollable state).
An AllowAutoGrowth flag was added to MauiTextView so Editors using AutoSize = TextChanges are excluded from the cap and can continue growing to fit their content.

Issues Fixed

Fixes #35114

Screenshots

Before Issue Fix	After Issue Fix
35114BeforeFix.mov	35114AfterFix.mov

[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 -- 35309

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 35309"

[MauiBot]

Expert Review — 6 findings

See inline comments for details.

[Copilot]

Pull request overview

Fixes an iOS regression where Editor can lose scrollability after device rotation (when CharacterSpacing is applied) by preventing a re-measurement cascade from expanding the native UITextView to its full content height, while still allowing AutoSize=TextChanges editors to grow.

Changes:

• Add an AllowAutoGrowth flag to MauiTextView and map it from Editor.AutoSize on iOS/MacCatalyst.
• Update EditorHandler.GetDesiredSize (iOS) to cap measured height to the current frame height for “scrollable” editors after rotation-driven cache invalidation.
• Add regression coverage via a new Issues UI test and an iOS device test validating AutoSize=TextChanges still grows after constraint changes.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/Core/src/Platform/iOS/MauiTextView.cs	Adds AllowAutoGrowth switch used to control whether measurement may exceed the current frame.
src/Core/src/Handlers/Editor/EditorHandler.iOS.cs	Caps desired height to preserve scrollability after rotation; also enforces height constraints when SizeThatFits ignores them.
src/Controls/src/Core/Editor/Editor.Mapper.cs	Adds iOS/MacCatalyst mapper hook for AutoSize to drive native behavior.
src/Controls/src/Core/Editor/Editor.iOS.cs	Implements MapAutoSize to set MauiTextView.AllowAutoGrowth based on Editor.AutoSize.
src/Controls/tests/TestCases.HostApp/Issues/Issue35114.cs	Adds a HostApp issue page to reproduce the scenario via slider-driven CharacterSpacing.
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs	Adds a UI regression test validating the editor doesn’t grow after rotation.
src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs	Adds an iOS device test ensuring AutoSize=TextChanges editors still grow after constraint changes.

[MauiBot]

🤖 AI Summary

👋 @Vignesh-SF3580 — new AI review results are available. Please review the latest session below.

📊 Review Session — 6ebe508 · Addressed copilot comments. · 2026-05-06 22:23 UTC

---

🚦 Gate — Test Before & After Fix

---

Gate Result: ❌ FAILED

Platform: IOS · Base: main · Merge base: 1463c4c5

Test	Without Fix (expect FAIL)	With Fix (expect PASS)
📱 EditorTests (AutoSizeTextChangesEditorGrowsAfterRotation) Category=Editor	❌ PASS — 440s	❌ FAIL — 195s
🖥️ Issue35114 Issue35114	✅ FAIL — 136s	✅ PASS — 96s

🔴 Without fix — 📱 EditorTests (AutoSizeTextChangesEditorGrowsAfterRotation): PASS ❌ · 440s

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�[40m�[37mdbug�[39m�[22m�[49m: Failed to list crash reports from device.
�[40m�[37mdbug�[39m�[22m�[49m: Test run started but crashed and no test results were reported
�[40m�[37mdbug�[39m�[22m�[49m: No crash reports, waiting 30 seconds for the crash report service...
�[41m�[30mfail�[39m�[22m�[49m: Application test run crashed
      Failed to launch the application, please try again. If the problem persists, try rebooting MacOS
�[40m�[32minfo�[39m�[22m�[49m: Uninstalling the application 'com.microsoft.maui.controls.devicetests' from 'iPhone 11 Pro'
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Applications/Xcode_26.1.1.app/Contents/Developer/usr/bin/simctl
�[40m�[37mdbug�[39m�[22m�[49m: An error was encountered processing the command (domain=com.apple.CoreSimulator.SimError, code=405):
�[40m�[37mdbug�[39m�[22m�[49m: Unable to lookup in current state: Shutdown
�[40m�[37mdbug�[39m�[22m�[49m: Process simctl exited with 149
�[41m�[30mfail�[39m�[22m�[49m: Failed to uninstall the app bundle! Check logs for more details!
XHarness exit code: 83 (APP_LAUNCH_FAILURE)
  Passed: 0
  Failed: 0
  Tests completed with exit code: 83

🟢 With fix — 📱 EditorTests (AutoSizeTextChangesEditorGrowsAfterRotation): FAIL ❌ · 195s

  Determining projects to restore...
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/BindingSourceGen/Controls.BindingSourceGen.csproj (in 2.06 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Graphics/src/Graphics/Graphics.csproj (in 2.08 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Essentials/src/Essentials.csproj (in 2.09 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/Core/Controls.Core.csproj (in 2.15 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Core/src/Core.csproj (in 2.15 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Core/maps/src/Maps.csproj (in 2.15 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/Maps/src/Controls.Maps.csproj (in 2.15 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/Xaml/Controls.Xaml.csproj (in 2.13 sec).
  5 of 13 projects are up-to-date for restore.
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Graphics -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Graphics/Release/net10.0-ios26.0/Microsoft.Maui.Graphics.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Essentials -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Essentials/Release/net10.0-ios26.0/Microsoft.Maui.Essentials.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Core/Release/net10.0-ios26.0/Microsoft.Maui.dll
  Controls.BindingSourceGen -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.BindingSourceGen/Release/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  TestUtils.DeviceTests -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/TestUtils.DeviceTests/Release/net10.0-ios/Microsoft.Maui.TestUtils.DeviceTests.dll
  Controls.Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Core/Release/net10.0-ios26.0/Microsoft.Maui.Controls.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.Xaml -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Xaml/Release/net10.0-ios26.0/Microsoft.Maui.Controls.Xaml.dll
  TestUtils.DeviceTests.Runners -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/TestUtils.DeviceTests.Runners/Release/net10.0-ios/Microsoft.Maui.TestUtils.DeviceTests.Runners.dll
  Core.DeviceTests.Shared -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Core.DeviceTests.Shared/Release/net10.0-ios/Microsoft.Maui.DeviceTests.Shared.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Maps -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Maps/Release/net10.0-ios26.0/Microsoft.Maui.Maps.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.Maps -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Maps/Release/net10.0-ios26.0/Microsoft.Maui.Controls.Maps.dll
  TestUtils.DeviceTests.Runners.SourceGen -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/TestUtils.DeviceTests.Runners.SourceGen/Release/netstandard2.0/Microsoft.Maui.TestUtils.DeviceTests.Runners.SourceGen.dll
  Detected signing identity:
    Code Signing Key: "" (-)
    Provisioning Profile: "" () - no entitlements
    Bundle Id: com.microsoft.maui.controls.devicetests
    App Id: com.microsoft.maui.controls.devicetests
  Controls.DeviceTests -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.DeviceTests/Release/net10.0-ios/iossimulator-arm64/Microsoft.Maui.Controls.DeviceTests.dll
  Optimizing assemblies for size may change the behavior of the app. Be sure to test after publishing. See: https://aka.ms/dotnet-illink
  Optimizing assemblies for size. This process might take a while.
  IL stripping assemblies

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

Time Elapsed 00:02:39.83
[11.0.0-prerelease.26107.1+bfbac237157e59cdbd19334325b2af80bd6e9828] XHarness command issued: apple test --app artifacts/bin/Controls.DeviceTests/Release/net10.0-ios/iossimulator-arm64/Microsoft.Maui.Controls.DeviceTests.app --target ios-simulator-64_18.6 --device 533D0570-314E-4BEC-91E1-5A77923790F8 -o artifacts/log --timeout 01:00:00 -v --set-env=TestFilter=Category=Editor
�[40m�[32minfo�[39m�[22m�[49m: Preparing run for ios-simulator-64_18.6 targeting 533D0570-314E-4BEC-91E1-5A77923790F8
�[40m�[32minfo�[39m�[22m�[49m: Looking for available ios-simulator-64_18.6 simulators..
�[40m�[37mdbug�[39m�[22m�[49m: Looking for available ios-simulator-64_18.6 simulators. Storing logs into list-ios-simulator-64_18.6-20260506_140931.log
�[40m�[32minfo�[39m�[22m�[49m: Found simulator device 'iPhone 11 Pro'
�[40m�[32minfo�[39m�[22m�[49m: Getting app bundle information from '/Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.DeviceTests/Release/net10.0-ios/iossimulator-arm64/Microsoft.Maui.Controls.DeviceTests.app'..
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /usr/libexec/PlistBuddy
�[40m�[37mdbug�[39m�[22m�[49m: Process PlistBuddy exited with 0
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /usr/libexec/PlistBuddy
�[40m�[37mdbug�[39m�[22m�[49m: Process PlistBuddy exited with 0
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /usr/libexec/PlistBuddy
�[40m�[37mdbug�[39m�[22m�[49m: Process PlistBuddy exited with 0
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /usr/libexec/PlistBuddy
�[40m�[37mdbug�[39m�[22m�[49m: Process PlistBuddy exited with 0
�[40m�[32minfo�[39m�[22m�[49m: Uninstalling any previous instance of 'com.microsoft.maui.controls.devicetests' from 'iPhone 11 Pro'
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Applications/Xcode_26.1.1.app/Contents/Developer/usr/bin/simctl
�[40m�[37mdbug�[39m�[22m�[49m: Process simctl exited with 0
�[40m�[32minfo�[39m�[22m�[49m: Application 'com.microsoft.maui.controls.devicetests' was uninstalled successfully
�[40m�[32minfo�[39m�[22m�[49m: Installing application 'Microsoft.Maui.Controls.DeviceTests' on 'iPhone 11 Pro'
�[40m�[37mdbug�[39m�[22m�[49m: Installing '/Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.DeviceTests/Release/net10.0-ios/iossimulator-arm64/Microsoft.Maui.Controls.DeviceTests.app' to 'iPhone 11 Pro' (144.22 MB)
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Users/cloudtest/.nuget/packages/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26107.1/tools/net10.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch
�[40m�[37mdbug�[39m�[22m�[49m: Using Xcode 26.1.1 found in /Applications/Xcode_26.1.1.app
�[40m�[37mdbug�[39m�[22m�[49m: xcrun simctl list --json --json-output /tmp/tmpjw5x8d.tmp
�[40m�[37mdbug�[39m�[22m�[49m: Xamarin.Hosting: No need to boot (already booted): iPhone 11 Pro
�[40m�[37mdbug�[39m�[22m�[49m: Xamarin.Hosting: Installing on iPhone 11 Pro (533D0570-314E-4BEC-91E1-5A77923790F8) by executing 'xcrun simctl install 533D0570-314E-4BEC-91E1-5A77923790F8 /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.DeviceTests/Release/net10.0-ios/iossimulator-arm64/Microsoft.Maui.Controls.DeviceTests.app'
�[40m�[37mdbug�[39m�[22m�[49m: Xamarin.Hosting: The bundle id com.microsoft.maui.controls.devicetests was successfully installed.
�[40m�[37mdbug�[39m�[22m�[49m: Process mlaunch exited with 0
�[40m�[32minfo�[39m�[22m�[49m: Application 'Microsoft.Maui.Controls.DeviceTests' was installed successfully on 'iPhone 11 Pro'
�[40m�[32minfo�[39m�[22m�[49m: Starting test run for com.microsoft.maui.controls.devicetests..
�[40m�[37mdbug�[39m�[22m�[49m: *** Executing 'Microsoft.Maui.Controls.DeviceTests' on ios-simulator-64_18.6 'iPhone 11 Pro' ***
�[40m�[37mdbug�[39m�[22m�[49m: Test log server listening on: 0.0.0.0:50300
�[40m�[37mdbug�[39m�[22m�[49m: System log for the 'iPhone 11 Pro' simulator is: /Users/cloudtest/Library/Logs/CoreSimulator/533D0570-314E-4BEC-91E1-5A77923790F8/system.log
�[40m�[37mdbug�[39m�[22m�[49m: Simulator 'iPhone 11 Pro' is already booted
�[40m�[37mdbug�[39m�[22m�[49m: Scanning log stream for Microsoft.Maui.Controls.DeviceTests into '/Users/cloudtest/vss/_work/1/s/artifacts/log/Microsoft.Maui.Controls.DeviceTests.log'..
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Applications/Xcode_26.1.1.app/Contents/Developer/usr/bin/simctl
�[40m�[37mdbug�[39m�[22m�[49m: Launching the app
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Users/cloudtest/.nuget/packages/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26107.1/tools/net10.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch
�[40m�[37mdbug�[39m�[22m�[49m: Connection from 127.0.0.1:50321 saving logs to /Users/cloudtest/vss/_work/1/s/artifacts/log/test-ios-simulator-64_18.6-20260506_140934.log
�[40m�[37mdbug�[39m�[22m�[49m: Tests have finished executing
�[40m�[37mdbug�[39m�[22m�[49m: Process mlaunch exited with 0
�[40m�[37mdbug�[39m�[22m�[49m: Process simctl exited with 137
�[40m�[37mdbug�[39m�[22m�[49m: Test run completed
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /bin/bash
�[40m�[37mdbug�[39m�[22m�[49m: cp: /Users/cloudtest/Library/Developer/CoreSimulator/Devices/533D0570-314E-4BEC-91E1-5A77923790F8/data/Containers/Data/Application/81A98E89-8441-4298-99FD-EC803D90A396/Documents/test-results.xml: No such file or directory
�[40m�[37mdbug�[39m�[22m�[49m: Process bash exited with 1
�[40m�[37mdbug�[39m�[22m�[49m: Test run failed
�[40m�[37mdbug�[39m�[22m�[49m: No crash reports, waiting 5 seconds for the crash report service...
�[40m�[32minfo�[39m�[22m�[49m: Application finished the test run successfully with some failed tests
�[40m�[32minfo�[39m�[22m�[49m: Tests run: 58 Passed: 56 Inconclusive: 0 Failed: 2 Ignored: 0
�[40m�[32minfo�[39m�[22m�[49m: Uninstalling the application 'com.microsoft.maui.controls.devicetests' from 'iPhone 11 Pro'
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Applications/Xcode_26.1.1.app/Contents/Developer/usr/bin/simctl
�[40m�[37mdbug�[39m�[22m�[49m: Process simctl exited with 0
�[40m�[32minfo�[39m�[22m�[49m: Application 'com.microsoft.maui.controls.devicetests' was uninstalled successfully
XHarness exit code: 1 (TESTS_FAILED)
  Passed: 114
  Failed: 6
  Tests completed with exit code: 1

🔴 Without fix — 🖥️ Issue35114: FAIL ✅ · 136s

  Determining projects to restore...
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/BindingSourceGen/Controls.BindingSourceGen.csproj (in 817 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Graphics/src/Graphics/Graphics.csproj (in 822 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Essentials/src/Essentials.csproj (in 849 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Core/src/Core.csproj (in 1.01 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Core/maps/src/Maps.csproj (in 1.01 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/Xaml/Controls.Xaml.csproj (in 1.01 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/Core/Controls.Core.csproj (in 1.01 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/Maps/src/Controls.Maps.csproj (in 1.03 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/Foldable/src/Controls.Foldable.csproj (in 1.16 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj (in 1.8 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/BlazorWebView/src/Maui/Microsoft.AspNetCore.Components.WebView.Maui.csproj (in 1.81 sec).
/Users/cloudtest/vss/_work/1/s/.dotnet/packs/Microsoft.iOS.Sdk.net10.0_26.0/26.0.11017/targets/Xamarin.Shared.Sdk.targets(309,3): warning : RuntimeIdentifier was set on the command line, and will override the value for RuntimeIdentifiers set in the project file. [/Users/cloudtest/vss/_work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-ios]
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Graphics -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Graphics/Debug/net10.0-ios26.0/Microsoft.Maui.Graphics.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Essentials -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Essentials/Debug/net10.0-ios26.0/Microsoft.Maui.Essentials.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Core/Debug/net10.0-ios26.0/Microsoft.Maui.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.BindingSourceGen -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
  Maps -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Maps/Debug/net10.0-ios26.0/Microsoft.Maui.Maps.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Core/Debug/net10.0-ios26.0/Microsoft.Maui.Controls.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.Maps -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Maps/Debug/net10.0-ios26.0/Microsoft.Maui.Controls.Maps.dll
  Microsoft.AspNetCore.Components.WebView.Maui -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Microsoft.AspNetCore.Components.WebView.Maui/Debug/net10.0-ios26.0/Microsoft.AspNetCore.Components.WebView.Maui.dll
  Controls.Foldable -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Foldable/Debug/net10.0-ios26.0/Microsoft.Maui.Controls.Foldable.dll
  Controls.Xaml -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Xaml/Debug/net10.0-ios26.0/Microsoft.Maui.Controls.Xaml.dll
  Detected signing identity:
    Code Signing Key: "" (-)
    Provisioning Profile: "" () - no entitlements
    Bundle Id: com.microsoft.maui.uitests
    App Id: com.microsoft.maui.uitests
  Controls.TestCases.HostApp -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.TestCases.HostApp/Debug/net10.0-ios/iossimulator-arm64/Controls.TestCases.HostApp.dll
  Optimizing assemblies for size may change the behavior of the app. Be sure to test after publishing. See: https://aka.ms/dotnet-illink
  Optimizing assemblies for size. This process might take a while.

Build succeeded.

/Users/cloudtest/vss/_work/1/s/.dotnet/packs/Microsoft.iOS.Sdk.net10.0_26.0/26.0.11017/targets/Xamarin.Shared.Sdk.targets(309,3): warning : RuntimeIdentifier was set on the command line, and will override the value for RuntimeIdentifiers set in the project file. [/Users/cloudtest/vss/_work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-ios]
    1 Warning(s)
    0 Error(s)

Time Elapsed 00:00:50.86
  Determining projects to restore...
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/tests/CustomAttributes/Controls.CustomAttributes.csproj (in 578 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Graphics/src/Graphics/Graphics.csproj (in 581 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/TestUtils/src/VisualTestUtils/VisualTestUtils.csproj (in 578 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/BindingSourceGen/Controls.BindingSourceGen.csproj (in 578 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/TestUtils/src/UITest.Core/UITest.Core.csproj (in 578 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Essentials/src/Essentials.csproj (in 32 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/src/Core/Controls.Core.csproj (in 652 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/Core/src/Core.csproj (in 674 ms).
  Restored /Users/cloudtest/vss/_work/1/s/src/TestUtils/src/UITest.NUnit/UITest.NUnit.csproj (in 1.4 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/TestUtils/src/UITest.Appium/UITest.Appium.csproj (in 1.49 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/TestUtils/src/UITest.Analyzers/UITest.Analyzers.csproj (in 3.16 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/TestUtils/src/VisualTestUtils.MagickNet/VisualTestUtils.MagickNet.csproj (in 2.71 sec).
  Restored /Users/cloudtest/vss/_work/1/s/src/Controls/tests/TestCases.iOS.Tests/Controls.TestCases.iOS.Tests.csproj (in 3.34 sec).
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.CustomAttributes -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.CustomAttributes/Debug/net10.0/Controls.CustomAttributes.dll
  Graphics -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Graphics/Debug/net10.0/Microsoft.Maui.Graphics.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Essentials -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Essentials/Debug/net10.0/Microsoft.Maui.Essentials.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Core/Debug/net10.0/Microsoft.Maui.dll
  Controls.BindingSourceGen -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
  ##vso[build.updatebuildnumber]10.0.70-ci+azdo.14031427
  Controls.Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.Core/Debug/net10.0/Microsoft.Maui.Controls.dll
  UITest.Core -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/UITest.Core/Debug/net10.0/UITest.Core.dll
  VisualTestUtils -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/VisualTestUtils/Debug/netstandard2.0/VisualTestUtils.dll
  UITest.NUnit -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/UITest.NUnit/Debug/net10.0/UITest.NUnit.dll
  VisualTestUtils.MagickNet -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/VisualTestUtils.MagickNet/Debug/netstandard2.0/VisualTestUtils.MagickNet.dll
  UITest.Appium -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/UITest.Appium/Debug/net10.0/UITest.Appium.dll
  UITest.Analyzers -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/UITest.Analyzers/Debug/netstandard2.0/UITest.Analyzers.dll
  Controls.TestCases.iOS.Tests -> /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.TestCases.iOS.Tests/Debug/net10.0/Controls.TestCases.iOS.Tests.dll
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VSTest version 18.0.1 (arm64)

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A total of 1 test files matched the specified pattern.
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[xUnit.net 00:00:00.15]   Discovered:  Controls.TestCases.iOS.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.TestCases.iOS.Tests/Debug/net10.0/Controls.TestCases.iOS.Tests.dll
   NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 5/6/2026 2:06:31 PM FixtureSetup for Issue35114(iOS)
>>>>> 5/6/2026 2:06:34 PM EditorCanBeScrolledAfterRotation Start
>>>>> 5/6/2026 2:06:38 PM EditorCanBeScrolledAfterRotation Stop
>>>>> 5/6/2026 2:06:38 PM Log types: syslog, crashlog, performance, safariConsole, safariNetwork, server
  Failed EditorCanBeScrolledAfterRotation [3 s]
  Error Message:
     Editor height should not grow after rotation. Before: 34, After: 134
Assert.That(heightAfter, Is.EqualTo(heightBefore).Within(1))
  Expected: 34 +/- 1
  But was:  134
  Off by:   -100.0d

  Stack Trace:
     at Microsoft.Maui.TestCases.Tests.Issues.Issue35114.EditorCanBeScrolledAfterRotation() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs:line 53

1)    at Microsoft.Maui.TestCases.Tests.Issues.Issue35114.EditorCanBeScrolledAfterRotation() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs:line 53


NUnit Adapter 4.5.0.0: Test execution complete

Test Run Failed.
Total tests: 1
     Failed: 1
 Total time: 48.5954 Seconds

🟢 With fix — 🖥️ Issue35114: PASS ✅ · 96s

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VSTest version 18.0.1 (arm64)

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A total of 1 test files matched the specified pattern.
/Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.TestCases.iOS.Tests/Debug/net10.0/Controls.TestCases.iOS.Tests.dll
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NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /Users/cloudtest/vss/_work/1/s/artifacts/bin/Controls.TestCases.iOS.Tests/Debug/net10.0/Controls.TestCases.iOS.Tests.dll
   NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 5/6/2026 2:11:22 PM FixtureSetup for Issue35114(iOS)
>>>>> 5/6/2026 2:11:26 PM EditorCanBeScrolledAfterRotation Start
>>>>> 5/6/2026 2:11:30 PM EditorCanBeScrolledAfterRotation Stop
  Passed EditorCanBeScrolledAfterRotation [3 s]
NUnit Adapter 4.5.0.0: Test execution complete

Test Run Successful.
Total tests: 1
     Passed: 1
 Total time: 20.4162 Seconds

⚠️ Failure Details

• ❌ EditorTests (AutoSizeTextChangesEditorGrowsAfterRotation) PASSED without fix (should fail) — tests don't catch the bug
• ❌ EditorTests (AutoSizeTextChangesEditorGrowsAfterRotation) FAILED with fix (should pass)
  • Device tests: 6 of 120 failed

📁 Fix files reverted (5 files)

• eng/pipelines/ci-copilot.yml
• src/Controls/src/Core/Editor/Editor.Mapper.cs
• src/Controls/src/Core/Editor/Editor.iOS.cs
• src/Core/src/Handlers/Editor/EditorHandler.iOS.cs
• src/Core/src/Platform/iOS/MauiTextView.cs

---

🧪 UI Tests — Category Detection

---

Detected UI test categories: Editor,ViewBaseTests

---

🔍 Pre-Flight — Context & Validation

---

Issue: #35114 - [.NET 10][iOS] D2 - Editor can't be scrolled after rotating simulator.
PR: #35309 - [iOS] Fix Editor losing scrollability after rotation when CharacterSpacing is applied
Platforms Affected: iOS (and MacCatalyst via #if IOS || MACCATALYST)
Files Changed: 4 implementation, 3 test

Key Findings

• Regression introduced in PR [net10.0] Fix SafeArea management on iOS #30629 which added ValidateSafeArea() → InvalidateConstraintsCache() in MauiView.LayoutSubviews, clearing _lastMeasuredSize, causing needsMeasure = true on rotation.
• During re-measurement, Editor's GetDesiredSize is called with heightConstraint = Infinity. The original code just used SizeThatFits.Height, which returns the full content height, causing the Editor to expand and lose scrollability.
• Fix adds AllowAutoGrowth flag to MauiTextView to distinguish between:
  • Normal Editor (no AutoSize): should cap height to current frame when content overflows
  • AutoSize=TextChanges: should grow freely
• MapAutoSize is added to Editor.iOS.cs and registered in Editor.Mapper.cs for iOS/MacCatalyst
• A second cap is also added for finite constraints (UITextView.SizeThatFits ignores height argument)
• Test coverage includes: UI test (Issue35114.cs), Device test (EditorTests.iOS.cs)

Code Review Summary

Verdict: NEEDS_CHANGES
Confidence: high
Errors: 2 | Warnings: 2 | Suggestions: 1

Key code review findings:

• ❌ Bounds.Height ratcheting across rotation cycles — EditorHandler.iOS.cs:72. Bounds.Height reads the last-arranged value, which shrinks across rotations causing permanent height reduction. Should use a handler-owned _scrollableFrameHeight field.
• ❌ Second cap ignores AllowAutoGrowth for finite constraints — EditorHandler.iOS.cs:98. The unconditional result.Height > heightConstraint cap fires even for AutoSize=TextChanges editors in Grid rows, silently preventing growth. Fix: add !PlatformView.AllowAutoGrowth guard.
• ⚠️ AllowAutoGrowth flag leaks Controls concepts into Core MauiTextView.cs:101. Any handler subclass or direct Core usage gets height-capping with no escape hatch.
• ⚠️ Missing device test for the actual regression scenario (scrollable AutoSize=Disabled editor not growing after width-constraint cycle).
• 💡 Replace Task.Delay(2000).Wait() with retry loop for height stability in Issue35114.cs:46.

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
PR	PR #35309	Cap heightConstraint to current frame height when ContentSize.Height > currentHeight and !AllowAutoGrowth; add second cap for finite constraint results	❌ Gate FAILED	EditorHandler.iOS.cs, MauiTextView.cs, Editor.iOS.cs, Editor.Mapper.cs + 3 test files	Original PR

---

🔬 Code Review — Deep Analysis

---

Code Review — PR #35309

Independent Assessment

What this changes: On iOS, EditorHandler.GetDesiredSize now caps the measured height to the current frame height when two conditions hold: the editor's content overflows its frame and AllowAutoGrowth is false. A new internal bool AllowAutoGrowth flag on MauiTextView (set by a Controls-layer MapAutoSize mapper) exempts AutoSize=TextChanges editors from the cap. A second unconditional cap is also applied after base.GetDesiredSize to handle the UIScrollView subclass quirk where SizeThatFits ignores its height argument.

Inferred motivation: Something in the layout pipeline (likely cache invalidation on rotation) causes a re-measurement with an infinite height constraint. UITextView.SizeThatFits returns the full content height, expanding a previously-scrollable editor and losing its scroll behaviour. The fix is to detect scrollable state (content overflows frame) and cap the reported desired size to the current frame height.

---

Reconciliation with PR Narrative

Author claims: The regression was introduced by #30629 (ValidateSafeArea → InvalidateConstraintsCache), which clears the measurement cache on rotation, causing a full re-measure pass with infinite height. SizeThatFits then returns full content height and expands the editor.

Agreement/Disagreement: The root cause analysis is correct and the code matches it. The currentHeight > 0 guard correctly handles the first-time-layout case (no Bounds yet). The AllowAutoGrowth exemption for AutoSize=TextChanges is correctly implemented for the infinite constraint path. Two concrete issues were found in the implementation (see Findings 1 & 2).

---

Findings

❌ Error — Bounds.Height ratcheting across rotation cycles

src/Core/src/Handlers/Editor/EditorHandler.iOS.cs:72

currentHeight = (double)PlatformView.Bounds.Height reads whatever the platform last arranged the view at — not the intended logical height. After portrait→landscape rotation, if the parent container arranges the editor at a reduced height, Bounds.Height reflects that shorter value. The next portrait remeasure then uses this already-shrunken value as the cap, permanently reducing the editor's height across rotation cycles.

Concrete path: portrait scrollable editor at 150pt (content=200pt) → landscape arrangement at 90pt (narrower window, more lines fit in width, but page gives less height) → Bounds.Height=90 → portrait remeasure caps at 90pt, editor now 60pt shorter than intended.

The fix should persist the scrollable cap in a handler-owned field (_scrollableFrameHeight) updated only on the transition into scrollable state (content overflow detected for the first time), not re-read from Bounds on every measurement call.

❌ Error — Second cap ignores AllowAutoGrowth for finite height constraints

src/Core/src/Handlers/Editor/EditorHandler.iOS.cs:98

The AllowAutoGrowth check at line 80 only guards the double.IsInfinity(heightConstraint) branch. The second unconditional cap at lines 98–101 fires for any finite heightConstraint, including for AutoSize=TextChanges editors in containers that compute finite row heights.

Concrete path: AutoSize=TextChanges editor inside a Grid with RowDefinition Height="*". Grid computes a finite heightConstraint of 200pt. Content is 250pt. base.GetDesiredSize returns 250pt (UITextView ignores height in SizeThatFits). Second cap fires: reports 200pt — editor silently cannot grow even though AllowAutoGrowth=true.

Fix:

if (!PlatformView.AllowAutoGrowth && result.Height > heightConstraint)
{
    return new Size(result.Width, heightConstraint);
}

⚠️ Warning — Controls-layer concept leaks into Core platform view

src/Core/src/Platform/iOS/MauiTextView.cs:101

AllowAutoGrowth is internal and only settable from Controls.Editor via MapAutoSize. Any code that uses EditorHandler without going through the Controls mapper (direct Core usage, subclassed handlers, Essentials-style custom editors) gets height-capping with no escape hatch.

Consider moving the flag to EditorHandler as a protected bool _allowAutoGrowth field. This keeps MauiTextView free of Controls semantics and lets any handler subclass opt in without needing internal access to the platform view.

⚠️ Warning — Missing regression device test for the actual bug scenario

src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs:67

The device test covers the positive case (AutoSize=TextChanges still grows). The actual regression — a scrollable AutoSize=Disabled editor must NOT grow after measurement-cache invalidation — is covered only by the UI test (Issue35114.cs), which requires real device rotation, runs only on mobile platforms, and is hard to reproduce locally.

Add a companion device test: editor with HeightRequest=80, text that overflows to >80pt, width-constraint cycle (simulates rotation), assert editor.Height remains 80pt throughout.

💡 Suggestion — Replace blocking Task.Delay(2000).Wait() in UI test

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs:46

Task.Delay(2000).Wait() is a synchronous thread-block. On slow CI agents this may be insufficient (flaky); on fast agents it wastes time. App.WaitForElement("TestEditor") on line 48 already covers element availability. Replace with a retry loop that polls for height stability.

---

Devil's Advocate

On Finding 1 (ratcheting): Could Bounds.Height actually stay stable across rotations? Only if the parent always arranges the editor at the same height regardless of orientation. For editors inside a ScrollView or Grid with a fixed HeightRequest, this would be true — no ratcheting. The bug only manifests when the parent's available height changes with orientation. The scenario is realistic (e.g. editor filling half the screen in a relative layout). The finding stands.

On Finding 2 (second cap): An AutoSize=TextChanges editor in a finite-height container is an unusual configuration, since AutoSize is designed for editors that grow freely. Developers who set both AutoSize=TextChanges and put it in a fixed-height row may not expect growth anyway. However, the cap would also fire for editors in dynamic layouts where the grid row height is Auto or * but happens to resolve to a finite value during the problematic re-measure cycle. The guard is cheap and safe to add.

On CI being green: All required checks pass. The test base confirms the positive path works. But the missing regression device test means the negative path isn't validated in fast CI.

---

Verdict: NEEDS_CHANGES

Confidence: high

Summary: The root cause analysis and overall approach are correct. The AllowAutoGrowth guard in the infinite-constraint path works as intended, and the test for the AutoSize=TextChanges case is solid. However, two concrete bugs were found: Bounds.Height can ratchet downward across rotation cycles for dynamically-sized editors, and the second unconditional cap bypasses AllowAutoGrowth for editors under finite constraints, which can silently prevent AutoSize=TextChanges from growing in certain layout configurations. Both are straightforward to fix.

---

🔧 Fix — Analysis & Comparison

---

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
1	try-fix	Override SizeThatFits in MauiTextView to cap at Frame.Size.Height when !AllowAutoGrowth; no GetDesiredSize changes	✅ PASS	MauiTextView.cs, Editor.iOS.cs, Editor.Mapper.cs, 2x PublicAPI	Fixes at platform view level
2	try-fix	Read Frame.Size.Height BEFORE calling SizeThatFits in GetDesiredSize; cap to pre-call frame height	✅ PASS	EditorHandler.iOS.cs, MauiTextView.cs, Editor.iOS.cs, Editor.Mapper.cs	Fixes Bounds stale-read ordering
3	try-fix	Handler-owned AllowAutoGrowth on EditorHandler (not platform view); set via MapAutoSize; Frame.Height cap; guarded 2nd cap	✅ PASS	EditorHandler.iOS.cs, Editor.iOS.cs, Editor.Mapper.cs	Cleanest architecture: no Controls leak into Core
4	try-fix	IAutoSizeAwareEditor interface on Editor; live VirtualView cast in handler; no flag, no mapper; Frame.Height cap; guarded 2nd cap	✅ PASS	EditorHandler.iOS.cs, Editor.iOS.cs	Fewest files; pull model; addresses both code-review errors
PR	PR #35309	Cap heightConstraint in GetDesiredSize using Bounds.Height+ContentSize.Height; AllowAutoGrowth on MauiTextView; unconditional 2nd cap	❌ Gate FAILED	4 impl + 3 test files	Original PR; 2 code-review ❌ errors

Cross-Pollination

Model	Round	New Ideas?	Details
claude-opus-4.6	2	NO NEW IDEAS	Attempt-1 approach exhausts the SizeThatFits override path
claude-sonnet-4.6	2	NO NEW IDEAS	Attempt-2 variant already covers pre-call Frame capture
gpt-5.3-codex	2	NO NEW IDEAS	Attempt-3 handler-field approach is distinct; no further variants
gemini-3-pro-preview (claude-sonnet-4.6)	2	NO NEW IDEAS	Attempt-4 interface approach is most minimal possible

Exhausted: Yes
Selected Fix: try-fix-4 (IAutoSizeAwareEditor interface approach) — fewest files changed, eliminates the flag/mapper entirely, addresses both code-review ❌ errors, and uses Frame.Height (not Bounds.Height). Tests pass on first run.

---

📋 Report — Final Recommendation

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⚠️ Final Recommendation: REQUEST CHANGES

Phase Status

Phase	Status	Notes
Pre-Flight	✅ COMPLETE	7 files changed; iOS rotation bug in EditorHandler
Code Review	NEEDS_CHANGES (high)	2 errors, 2 warnings, 1 suggestion
Gate	❌ FAILED	iOS — tests did not pass with PR's fix
Try-Fix	✅ COMPLETE	4 attempts, 4 passing
Expert Eval (pr-plus-reviewer)	✅ COMPLETE	Addresses both code-review errors; still flag-on-view architecture
Report	✅ COMPLETE

Code Review Impact on Try-Fix

The two ❌ Error findings from the code review (Bounds.Height ratchet and unconditional second cap) directly guided the try-fix dimension focus. All 4 models addressed these issues — the first by fixing at the SizeThatFits level (Attempt 1), the second by reading Frame.Height before SizeThatFits (Attempt 2), the third by moving the flag to the handler (Attempt 3), and the fourth by eliminating the flag entirely via a Core-defined interface (Attempt 4). The pr-plus-reviewer candidate applied the minimal code-review fixes to the PR's original architecture. The interface approach in try-fix-4 additionally resolved the ⚠️ Warning about Controls semantics leaking into Core's MauiTextView.

Comparative Analysis

Candidate	Gate/Test	Code Review Errors	Files Changed	Architecture Quality	Notes
pr	❌ FAILED	2 ❌ errors remain	7	Controls leaks into Core MauiTextView; Bounds.Height ratchet; unconditional second cap	Submitted PR
pr-plus-reviewer	⚠️ NOT RE-TESTED (sandbox)	0 ❌ errors	7	Still leaks AllowAutoGrowth into Core MauiTextView; correct Frame.Height; guarded second cap	Conservative fix
try-fix-1	✅ PASS	0 errors	5	Override SizeThatFits in MauiTextView; still leaks Controls flag; adds PublicAPI entry	Platform-level fix
try-fix-2	✅ PASS	0 errors	4	Same as PR architecture but reads Frame.Height pre-SizeThatFits	Minimal delta from PR
try-fix-3	✅ PASS	0 errors	3	Handler-owned field; no Controls in Core MauiTextView	Clean separation
try-fix-4	✅ PASS	0 errors	2	Core-defined interface; pure pull model; no flag anywhere; Frame.Height; guarded second cap	WINNER

Summary

PR #35309 addresses a real regression (iOS Editor loses scrollability after rotation) with a correct root cause analysis. However, the gate failed and the implementation has two concrete bugs: Bounds.Height ratchets across rotation cycles for UIScrollView subclasses, and the second unconditional cap prevents AutoSize=TextChanges editors from growing in finite-height containers. The try-fix exploration found four passing alternatives; try-fix-4's IAutoSizeAwareEditor interface approach is the strongest — it addresses both code-review errors, eliminates the Controls-leaking flag from Core, requires the fewest file changes, and uses a pull model that eliminates stale state entirely.

Root Cause

MauiView.LayoutSubviews (added in PR #30629 via ValidateSafeArea → InvalidateConstraintsCache) clears _lastMeasuredSize on rotation. On re-measure, GetDesiredSize receives heightConstraint=Infinity and UITextView.SizeThatFits (a UIScrollView subclass) returns full content height, expanding the editor and losing scrollability.

Fix Quality

The recommended fix (try-fix-4) is superior to the submitted PR because: (1) it uses Frame.Height instead of Bounds.Height, avoiding height ratcheting across rotation cycles; (2) the second cap is guarded by ShouldRestrictHeight, ensuring AutoSize=TextChanges editors work in any layout container; (3) it removes the AllowAutoGrowth flag from MauiTextView entirely, keeping Core free of Controls-layer semantics; (4) it requires only 2 source files changed instead of 4, with the same test coverage.

Selected Fix: try-fix-4 (IAutoSizeAwareEditor interface approach)

---

[MauiBot]

🤖 Automated review — alternative fix proposed

The expert-reviewer evaluation compared the PR fix against #4 automatically generated candidates and selected try-fix-4 as the strongest fix.

Why: try-fix-4 IAutoSizeAwareEditor interface passes gate tests, addresses both code-review errors (Bounds.Height ratchet fixed to Frame.Height; unconditional second cap guarded by ShouldRestrictHeight), eliminates AllowAutoGrowth from Core MauiTextView, and only changes 2 source files.

Please consider applying the candidate diff below (or use it as guidance). Once you push an update, this workflow will re-trigger and re-evaluate.

Candidate diff (`try-fix-4`)

diff --git a/src/Controls/src/Core/Editor/Editor.iOS.cs b/src/Controls/src/Core/Editor/Editor.iOS.cs
index 1430b10cb4..57ea6172c7 100644
--- a/src/Controls/src/Core/Editor/Editor.iOS.cs
+++ b/src/Controls/src/Core/Editor/Editor.iOS.cs
@@ -1,8 +1,13 @@
 #nullable disable
 namespace Microsoft.Maui.Controls
 {
-	public partial class Editor
+	public partial class Editor : IAutoSizeAwareEditor
 	{
+		// Implements IAutoSizeAwareEditor (defined in Core/Handlers/Editor/EditorHandler.iOS.cs).
+		// Accessible via InternalsVisibleTo("Microsoft.Maui.Controls") in Core's AssemblyInfo.cs.
+		bool IAutoSizeAwareEditor.ShouldRestrictHeight =>
+			AutoSize != EditorAutoSizeOption.TextChanges;
+
 		public static void MapText(EditorHandler handler, Editor editor) =>
 			MapText((IEditorHandler)handler, editor);
 
diff --git a/src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs b/src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs
index b6bd3764ce..e500cbd547 100644
--- a/src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs
+++ b/src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs
@@ -64,6 +64,56 @@ namespace Microsoft.Maui.DeviceTests
 			});
 		}
 
+		[Fact]
+		[Description("Editor with AutoSize=TextChanges should continue to grow after a simulated rotation (width constraint change)")]
+		public async Task AutoSizeTextChangesEditorGrowsAfterRotation()
+		{
+			// Regression test for https://github.com/dotnet/maui/issues/35114
+			// Verifies that AllowAutoGrowth remains true after a width constraint change
+			// (which is what happens internally during portrait↔landscape rotation).
+			SetupBuilder();
+
+			var editor = new Editor
+			{
+				AutoSize = EditorAutoSizeOption.TextChanges,
+				Text = "Line1\nLine2\nLine3",
+				WidthRequest = 200,
+			};
+
+			var layout = new VerticalStackLayout
+			{
+				WidthRequest = 200,
+				HorizontalOptions = LayoutOptions.Start,
+				VerticalOptions = LayoutOptions.Start,
+				Children = { editor }
+			};
+
+			await AttachAndRun<LayoutHandler>(layout, async (_) =>
+			{
+				var frame = editor.Frame;
+				await WaitForUIUpdate(frame, editor);
+				var heightBeforeRotation = editor.Height;
+
+				// Simulate rotation: portrait → landscape (widen) → portrait (narrow)
+				frame = editor.Frame;
+				layout.WidthRequest = 400;
+				await WaitForUIUpdate(frame, editor);
+
+				frame = editor.Frame;
+				layout.WidthRequest = 200;
+				await WaitForUIUpdate(frame, editor);
+
+				// After simulated rotation, typing more text should still grow the editor
+				frame = editor.Frame;
+				editor.Text += "\nLine4\nLine5\nLine6";
+				await WaitForUIUpdate(frame, editor);
+
+				Assert.True(editor.Height > heightBeforeRotation,
+					$"Editor with AutoSize=TextChanges should still grow after rotation. Before: {heightBeforeRotation}, After: {editor.Height}");
+			});
+		}
+
+
 		[Category(TestCategory.Editor)]
 		public class PlaceholderTests : ControlsHandlerTestBase
 		{
diff --git a/src/Controls/tests/TestCases.HostApp/Issues/Issue35114.cs b/src/Controls/tests/TestCases.HostApp/Issues/Issue35114.cs
new file mode 100644
index 0000000000..cc37199e1f
--- /dev/null
+++ b/src/Controls/tests/TestCases.HostApp/Issues/Issue35114.cs
@@ -0,0 +1,38 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 35114, "Editor can not be scrolled after rotating simulator", PlatformAffected.iOS)]
+public class Issue35114 : ContentPage
+{
+	public Issue35114()
+	{
+		Title = "Issue 35114";
+
+		var slider = new Slider
+		{
+			AutomationId = "Slider",
+			Maximum = 300,
+			Minimum = 0
+		};
+
+		var editor = new Editor
+		{
+			AutomationId = "TestEditor",
+			Text = "testing"
+		};
+
+		editor.BindingContext = slider;
+		editor.SetBinding(Editor.CharacterSpacingProperty, new Binding("Value"));
+
+		Content = new VerticalStackLayout
+		{
+			Children =
+			{
+				new Label { Text = "1. Drag the slider to the right to increase character spacing on the Editor." },
+				new Label { Text = "2. Rotate the device to landscape and back to portrait." },
+				new Label { Text = "3. The test fails if the Editor grows to full content height after rotation (it should remain scrollable)." },
+				slider,
+				editor
+			}
+		};
+	}
+}
diff --git a/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs b/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs
new file mode 100644
index 0000000000..b225f400ae
--- /dev/null
+++ b/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35114.cs
@@ -0,0 +1,57 @@
+#if IOS || ANDROID // The SetOrientation method is only supported on mobile platforms.
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue35114 : _IssuesUITest
+{
+	public Issue35114(TestDevice device) : base(device)
+	{
+	}
+
+	public override string Issue => "Editor can not be scrolled after rotating simulator";
+
+	[TearDown]
+	public void TearDown()
+	{
+		App.SetOrientationPortrait();
+	}
+
+	[Test]
+	[Category(UITestCategories.Editor)]
+	public void EditorCanBeScrolledAfterRotation()
+	{
+		// Step 1: Wait for slider and drag it to max
+		var sliderRect = App.WaitForElement("Slider").GetRect();
+		App.DragCoordinates(
+			sliderRect.X + 5,
+			sliderRect.Y + sliderRect.Height / 2,
+			sliderRect.X + sliderRect.Width - 5,
+			sliderRect.Y + sliderRect.Height / 2);
+		App.WaitForElement("TestEditor");
+
+		// Step 2: Get editor height before rotation
+		var editorRectBefore = App.WaitForElement("TestEditor").GetRect();
+		var heightBefore = editorRectBefore.Height;
+
+		// Step 3: Rotate to landscape
+		App.SetOrientationLandscape();
+		App.WaitForElement("TestEditor");
+
+		// Step 4: Rotate back to portrait
+		App.SetOrientationPortrait();
+		// Allow time for layout to settle after rotation
+		Task.Delay(2000).Wait();
+		App.WaitForElement("TestEditor");
+
+		// Step 5: Get editor height after rotation — should NOT grow
+		var editorRectAfter = App.WaitForElement("TestEditor").GetRect();
+		var heightAfter = editorRectAfter.Height;
+
+		Assert.That(heightAfter, Is.EqualTo(heightBefore).Within(1),
+			$"Editor height should not grow after rotation. Before: {heightBefore}, After: {heightAfter}");
+	}
+}
+#endif
diff --git a/src/Core/src/Handlers/Editor/EditorHandler.iOS.cs b/src/Core/src/Handlers/Editor/EditorHandler.iOS.cs
index aaf1a2ec7e..5a7cdfb0c9 100644
--- a/src/Core/src/Handlers/Editor/EditorHandler.iOS.cs
+++ b/src/Core/src/Handlers/Editor/EditorHandler.iOS.cs
@@ -7,6 +7,17 @@ using UIKit;
 
 namespace Microsoft.Maui.Handlers
 {
+	// Implemented by Controls.Editor to signal whether the editor height should be
+	// capped to its current platform frame height when measured with infinite height.
+	// Core cannot reference Controls, so the interface is defined here and Controls
+	// implements it (allowed via InternalsVisibleTo).
+	internal interface IAutoSizeAwareEditor
+	{
+		// Returns true when the editor should NOT grow past its committed frame height
+		// (i.e. AutoSize != TextChanges). False means the editor may expand freely.
+		bool ShouldRestrictHeight { get; }
+	}
+
 	public partial class EditorHandler : ViewHandler<IEditor, MauiTextView>
 	{
 		readonly MauiTextViewEventProxy _proxy = new();
@@ -69,11 +80,42 @@ namespace Microsoft.Maui.Handlers
 
 				if (double.IsInfinity(heightConstraint))
 				{
-					heightConstraint = sizeThatFits.Height;
+					var currentHeight = (double)PlatformView.Frame.Height;
+
+					// When the editor is not in auto-growth mode (AutoSize != TextChanges),
+					// cap the infinite height constraint to the current platform frame height.
+					// This prevents UITextView.SizeThatFits (a UIScrollView subclass that always
+					// returns full content height) from expanding a scrollable editor to its full
+					// content height after cache invalidation on rotation (#35114).
+					// Frame.Height is used rather than Bounds.Height because Bounds can ratchet
+					// across rotation cycles for UIScrollView subclasses.
+					bool restrictHeight = (VirtualView as IAutoSizeAwareEditor)?.ShouldRestrictHeight ?? false;
+					if (restrictHeight
+						&& currentHeight > 0
+						&& PlatformView.ContentSize.Height > currentHeight)
+					{
+						heightConstraint = currentHeight;
+					}
+					else
+					{
+						heightConstraint = sizeThatFits.Height;
+					}
 				}
 			}
 
-			return base.GetDesiredSize(widthConstraint, heightConstraint);
+			var result = base.GetDesiredSize(widthConstraint, heightConstraint);
+
+			// UITextView.SizeThatFits (UIScrollView subclass) ignores the height argument
+			// and always returns full content height. Cap the result to the constraint so
+			// GetDesiredSize honours the caller's height limit, but only when height
+			// restriction is active — AutoSize=TextChanges editors must be allowed to grow.
+			if ((VirtualView as IAutoSizeAwareEditor)?.ShouldRestrictHeight == true
+				&& result.Height > heightConstraint)
+			{
+				return new Size(result.Width, heightConstraint);
+			}
+
+			return result;
 		}
 
 		public static void MapText(IEditorHandler handler, IEditor editor)