Fix the ListView scroll position center and end without animation

src/Controls/src/Core/Compatibility/Handlers/ListView/Windows/ListViewRenderer.cs

@@ -656,26 +656,25 @@ async void ScrollTo(object group, object item, ScrollToPosition toPosition, bool
 							else
 								semanticLocation.Bounds = new WRect(0, viewportHeight - tHeight, 0, 0);
 
+							// Waiting for loaded doesn't seem to be enough anymore; the ScrollViewer does not appear until after Loaded.
+							// Even if the ScrollViewer is present, an invoke at low priority fails (E_FAIL) presumably because the items are
+							// still loading. An invoke at idle sometimes work, but isn't reliable enough, so we'll just have to commit
+							// treason and use a blanket catch for the E_FAIL and try again.
+							try
+							{
+								List.MakeVisible(semanticLocation);
+							}
+							catch (Exception)
+							{
+								if (previouslyFailed)
+									return;
+
+								Task.Delay(1).ContinueWith(ct => { ScrollTo(group, item, toPosition, shouldAnimate, includeGroup, true); }, TaskScheduler.FromCurrentSynchronizationContext()).WatchForError();
+							}
 							break;
 						}
 				}
 			});
-
-			// Waiting for loaded doesn't seem to be enough anymore; the ScrollViewer does not appear until after Loaded.
-			// Even if the ScrollViewer is present, an invoke at low priority fails (E_FAIL) presumably because the items are
-			// still loading. An invoke at idle sometimes work, but isn't reliable enough, so we'll just have to commit
-			// treason and use a blanket catch for the E_FAIL and try again.
-			try
-			{
-				List.MakeVisible(semanticLocation);
-			}
-			catch (Exception)
-			{
-				if (previouslyFailed)
-					return;
-
-				Task.Delay(1).ContinueWith(ct => { ScrollTo(group, item, toPosition, shouldAnimate, includeGroup, true); }, TaskScheduler.FromCurrentSynchronizationContext()).WatchForError();
-			}
 		}
 
 		void OnElementScrollToRequested(object sender, ScrollToRequestedEventArgs e)

src/Controls/tests/TestCases.HostApp/Issues/Issue26945.cs

@@ -0,0 +1,135 @@
+using System.Collections.ObjectModel;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 26945, "ListView ScrollTo position always remains at the start even when set to Center or End without animation", PlatformAffected.All)]
+	public class Issue26945 : ContentPage
+	{
+		private ListView ListView;
+		private ObservableCollection<string> Items;
+
+		public Issue26945()
+		{
+			Items = new ObservableCollection<string>
+			{
+				"Item 1",
+				"Item 2",
+				"Item 3",
+				"Item 4",
+				"Item 5",
+				"Item 6",
+				"Item 7",
+				"Item 8",
+				"Item 9",
+				"Item 10",
+				"Item 11",
+				"Item 12",
+				"Item 13",
+				"Item 14",
+				"Item 15",
+				"Item 16",
+				"Item 17",
+				"Item 18",
+				"Item 19",
+				"Item 20",
+				"Item 21",
+				"Item 22",
+				"Item 23",
+				"Item 24",
+				"Item 25",
+			};
+
+			ListView = new ListView
+			{
+				ItemsSource = Items,
+				SelectedItem = "Item 10",
+				VerticalOptions = LayoutOptions.Center,
+				HorizontalOptions = LayoutOptions.Center,
+				WidthRequest = 300,
+				HeightRequest = 220,
+			};
+
+			var horizontalStack = new StackLayout
+			{
+				Orientation = StackOrientation.Horizontal,
+				HorizontalOptions = LayoutOptions.Center,
+				Spacing = 20
+			};
+
+			var startButton = new Button
+			{
+				Text = "Start",
+				AutomationId = "StartButton",
+			};
+			startButton.Clicked += ScrollPositionStart_Clicked;
+
+			var centerButton = new Button
+			{
+				Text = "Center",
+				AutomationId = "CenterButton",
+			};
+			centerButton.Clicked += ScrollPositionCenter_Clicked;
+
+			var endButton = new Button
+			{
+				Text = "End",
+				AutomationId = "EndButton",
+			};
+			endButton.Clicked += ScrollPositionEnd_Clicked;
+
+			horizontalStack.Children.Add(startButton);
+			horizontalStack.Children.Add(centerButton);
+			horizontalStack.Children.Add(endButton);
+
+			var stackLayout = new StackLayout
+			{
+				Orientation = StackOrientation.Vertical,
+				Spacing = 20
+			};
+
+			stackLayout.Children.Add(ListView);
+			stackLayout.Children.Add(horizontalStack);
+			this.Content = stackLayout;
+		}
+
+		private void ScrollToSelectedItem(ScrollToPosition toPosition)
+		{
+			if (ListView?.SelectedItem != null)
+			{
+				switch (toPosition)
+				{
+					case ScrollToPosition.Start:
+						ListView.ScrollTo(ListView.SelectedItem, ScrollToPosition.Start, false);
+						break;
+					case ScrollToPosition.Center:
+						ListView.ScrollTo(ListView.SelectedItem, ScrollToPosition.Center, false);
+						break;
+					case ScrollToPosition.End:
+						ListView.ScrollTo(ListView.SelectedItem, ScrollToPosition.End, false);
+						break;
+				}
+			}
+		}
+
+		private void ScrollPositionStart_Clicked(object sender, EventArgs e)
+		{
+			var currentIndex = Items.IndexOf(ListView.SelectedItem as string);
+			ListView.SelectedItem = Items[currentIndex + 2];
+			ScrollToSelectedItem(ScrollToPosition.Start);
+		}
+
+		private void ScrollPositionCenter_Clicked(object sender, EventArgs e)
+		{
+			var currentIndex = Items.IndexOf(ListView.SelectedItem as string);
+			ListView.SelectedItem = Items[currentIndex + 2];
+			ScrollToSelectedItem(ScrollToPosition.Center);
+		}
+
+		private void ScrollPositionEnd_Clicked(object sender, EventArgs e)
+		{
+			var currentIndex = Items.IndexOf(ListView.SelectedItem as string);
+			ListView.SelectedItem = Items[currentIndex + 2];
+			ScrollToSelectedItem(ScrollToPosition.End);
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue26945.cs

@@ -0,0 +1,43 @@
+using NUnit.Framework;
+using NUnit.Framework.Legacy;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue26945 : _IssuesUITest
+	{
+		public override string Issue => "ListView ScrollTo position always remains at the start even when set to Center or End without animation";
+
+		public Issue26945(TestDevice device) : base(device)
+		{
+		}
+
+		[Test]
+		[Category(UITestCategories.ListView)]
+		public void Issue26945Test_SelectItemPositionStart()
+		{
+			App.WaitForElement("StartButton");
+			App.Tap("StartButton");
+			VerifyScreenshot();
+		}
+
+		[Test]
+		[Category(UITestCategories.ListView)]
+		public void Issue26945Test_SelectItemPositionCenter()
+		{
+			App.WaitForElement("CenterButton");
+			App.Tap("CenterButton");
+			VerifyScreenshot();
+		}
+
+		[Test]
+		[Category(UITestCategories.ListView)]
+		public void Issue26945Test_SelectItemPositionEnd()
+		{
+			App.WaitForElement("EndButton");
+			App.Tap("EndButton");
+			VerifyScreenshot();
+		}
+	}
+}