Fixed Query parameters not passed on Shell navigation

src/Controls/src/Core/Shell/ShellContent.cs

@@ -89,6 +89,12 @@ Page IShellContentController.GetOrCreateContent()
 				}
 
 				result = ContentCache ?? (Page)template.CreateContent(content, this);
+
+				if (GetValue(QueryAttributesProperty) is ShellRouteParameters delayedQueryParams)
+				{
+					result?.SetValue(QueryAttributesProperty, delayedQueryParams);
+				}
+
 				ContentCache = result;
 			}
 
@@ -104,9 +110,6 @@ Page IShellContentController.GetOrCreateContent()
 			if (result is NavigationPage)
 				throw new NotSupportedException("Shell is currently not compatible with NavigationPage. Shell has Navigation built in and doesn't require a NavigationPage.");
 
-			if (GetValue(QueryAttributesProperty) is ShellRouteParameters delayedQueryParams)
-				result.SetValue(QueryAttributesProperty, delayedQueryParams);
-
 			return result;
 		}
 

src/Controls/tests/TestCases.HostApp/Issues/Issue10509.cs

@@ -0,0 +1,82 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 10509, "Query parameter is missing after navigation", PlatformAffected.Android)]
+public class Issue10509 : Shell
+{
+	public Issue10509()
+	{
+		Routing.RegisterRoute(nameof(Issue10509Page1), typeof(Issue10509Page1));
+		Routing.RegisterRoute(nameof(Issue10509Page2), typeof(Issue10509Page2));
+
+		Items.Add(new ShellContent
+		{
+			Title = "First Page",
+			Route = nameof(Issue10509Page1),
+			ContentTemplate = new DataTemplate(typeof(Issue10509Page1))
+		});
+
+		Items.Add(new ShellContent
+		{
+			Title = "Second Page",
+			Route = nameof(Issue10509Page2),
+			ContentTemplate = new DataTemplate(typeof(Issue10509Page2))
+		});
+	}
+}
+
+public class Issue10509Page1 : ContentPage
+{
+	public Issue10509Page1()
+	{
+		var navigateBtn = new Button
+		{
+			Text = "Navigate to Page 2",
+			HorizontalOptions = LayoutOptions.Center,
+			AutomationId = "Page1Button"
+		};
+		navigateBtn.Clicked += NavigateBtn_Clicked;
+
+		Content = new VerticalStackLayout
+		{
+			VerticalOptions = LayoutOptions.Center,
+			Children = { navigateBtn }
+		};
+	}
+
+	private async void NavigateBtn_Clicked(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync($"//{nameof(Issue10509Page2)}?{Issue10509Page2.NavigationDataParam}=Passed");
+	}
+}
+
+[QueryProperty(nameof(NavigationData), NavigationDataParam)]
+public class Issue10509Page2 : ContentPage
+{
+	public const string NavigationDataParam = "NavigationDataParam";
+
+	private Label dataLabel;
+
+	public Issue10509Page2()
+	{
+		dataLabel = new Label
+		{
+			AutomationId = "Page2Label",
+			VerticalOptions = LayoutOptions.Center,
+			HorizontalOptions = LayoutOptions.Center
+		};
+
+		Content = new VerticalStackLayout
+		{
+			VerticalOptions = LayoutOptions.Center,
+			Children = { dataLabel }
+		};
+	}
+
+	public string NavigationData { get; set; }
+
+	protected override void OnNavigatedTo(NavigatedToEventArgs args)
+	{
+		base.OnNavigatedTo(args);
+		dataLabel.Text = $"Navigation data: {NavigationData ?? "Missed"}";
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue10509.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue10509 : _IssuesUITest
+{
+	public Issue10509(TestDevice testDevice) : base(testDevice)
+	{
+	}
+	public override string Issue => "Query parameter is missing after navigation";
+
+	[Test]
+	[Category(UITestCategories.Shell)]
+	public void QueryIsPassedOnNavigation()
+	{
+		App.WaitForElement("Page1Button");
+		App.Tap("Page1Button");
+		var label = App.WaitForElement("Page2Label");
+		Assert.That(label.GetText(), Is.EqualTo("Navigation data: Passed"));
+	}
+}