Backport Test Fixes and Snapshots from SR to Inflight Branch

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Bugzilla/Bugzilla40333.cs

@@ -36,10 +36,8 @@ public void ClickingOnMenuItemInRootDoesNotCrash_NavPageVersion()
 	public void ClickingOnMenuItemInRootDoesNotCrash_TabPageVersion()
 	{
 		App.WaitForElement(StillHereId);
-#if ANDROID || WINDOWS // On Android and Windows, two back navigation actions are needed because the back button's position is the same for both navigation and flyout pages. This requires a double navigation to return to the root page.
 		App.TapBackArrow();
 		App.WaitForElement(StillHereId);
-#endif
 		App.TapBackArrow();
 
 		App.WaitForElement(StartTabPageTestId);

src/Core/src/Handlers/ScrollView/ScrollViewHandler.Windows.cs

@@ -38,6 +38,12 @@ protected override void ConnectHandler(ScrollViewer platformView)
 
 		protected override void DisconnectHandler(ScrollViewer platformView)
 		{
+			// Cascade disconnect to the PresentedContent's handler. Without this, when the
+			// ScrollView is restored as ContentPage.Content after being swapped out, the
+			// PresentedContent's native view still has a stale parent (the old ContentPanel),
+			// causing a WinUI COM exception "Element already has a parent" (Issue #35277).
+			// Cascading here ensures ToPlatform() creates a fresh native view with no parent.
+			VirtualView?.PresentedContent?.Handler?.DisconnectHandler();
 			base.DisconnectHandler(platformView);
 			platformView.ViewChanged -= ViewChanged;
 		}
@@ -158,9 +164,6 @@ static void UpdateContentPanel(IScrollView scrollView, IScrollViewHandler handle
 				currentPaddingLayer.CachedChildren.Clear();
 			}
 
-			// Detach the old handler if it exists (prevents WinUI COM exception on reuse)
-			scrollView.PresentedContent.Handler?.DisconnectHandler();
-
 			var nativeContent = scrollView.PresentedContent.ToPlatform(handler.MauiContext);
 
 			if (currentPaddingLayer is not null)