[Android] Fix for the CarouselView doesn't scroll to the right Position after changing the ItemSource with Loop enabled.

src/Controls/src/Core/Handlers/Items/Android/MauiCarouselRecyclerView.cs

@@ -320,7 +320,13 @@ void UpdateInitialPosition()
 				Carousel.Position = position;
 			}
 			else
+			{
 				position = Carousel.Position;
+				if (Carousel.Loop && position == 0)
+				{
+					itemCount = ItemsViewAdapter.ItemsSource.Count;
+				}
+			}
 
 			_oldPosition = position;
 

src/Controls/tests/TestCases.HostApp/Issues/Issue17283.xaml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+              x:Class="Maui.Controls.Sample.Issues.Issue17283">
+
+  <VerticalStackLayout Padding="30,0"
+                         Spacing="25"
+                         VerticalOptions="Center">
+    <CarouselView x:Name="CarouselView"
+                      HeightRequest="200"
+                      BackgroundColor="AliceBlue" 
+                      ItemsSource="{Binding Items}"
+                      Loop="True"
+                      Position="{Binding Position, Mode=TwoWay}">
+      <CarouselView.ItemTemplate>
+        <DataTemplate>
+          <VerticalStackLayout HeightRequest="200" VerticalOptions="Center">
+            <Label FontSize="32" 
+                               HorizontalTextAlignment="Center"
+                               AutomationId="{Binding .}"
+                               Text="{Binding .}"
+                               VerticalTextAlignment="Center" />
+          </VerticalStackLayout>
+        </DataTemplate>
+      </CarouselView.ItemTemplate>
+    </CarouselView>
+    <Button AutomationId="reloadItemsButton" Command="{Binding ReloadItemsCommand}" Text="Reload Items" />
+    <Button AutomationId="goToLastItemButton" Command="{Binding GoToLastItemCommand}" Text="Go to last item" />
+  </VerticalStackLayout>
+
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue17283.xaml.cs

@@ -0,0 +1,63 @@
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	[Issue(IssueTracker.Github, 17283, "[Android] CarouselView doesn't scroll to the right Position after changing the ItemSource with Loop enabled", PlatformAffected.Android)]
+	public partial class Issue17283 : ContentPage
+	{
+		public Issue17283()
+		{
+			InitializeComponent();
+			BindingContext = new Issue17283ViewModel();
+		}
+	}
+
+	public class Issue17283ViewModel : INotifyPropertyChanged
+	{
+		ObservableCollection<string> _items;
+		public ObservableCollection<string> Items
+		{
+			get => _items;
+			set
+			{
+				_items = value;
+				OnPropertyChanged();
+			}
+		}
+
+		int _position;
+		public int Position
+		{
+			get => _position;
+			set
+			{
+				_position = value;
+				OnPropertyChanged();
+			}
+		}
+
+		public Command ReloadItemsCommand { get; set; }
+		public Command GoToLastItemCommand { get; set; }
+
+		public Issue17283ViewModel()
+		{
+			Items = new ObservableCollection<string> { "1", "2", "3", "4", "5" };
+			ReloadItemsCommand = new Command(ReloadItems);
+			GoToLastItemCommand = new Command(() => Position = Items.Count - 1);
+		}
+
+		async void ReloadItems()
+		{
+			var currentPosition = Position;
+			Items = new ObservableCollection<string> { "1", "2", "3", "4", "5last" };
+			await Task.Delay(300);
+			Position = currentPosition;
+		}
+		public event PropertyChangedEventHandler PropertyChanged;
+		void OnPropertyChanged([CallerMemberName] string propertyName = "") =>
+			PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue17283.cs

@@ -0,0 +1,28 @@
+#if !MACCATALYST
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+    internal class Issue17283 : _IssuesUITest
+	{
+		public override string Issue => "[Android] CarouselView doesn't scroll to the right Position after changing the ItemSource with Loop enabled";
+
+		public Issue17283(TestDevice testDevice) : base(testDevice) { }
+
+		[Test]
+		[Category(UITestCategories.CarouselView)]
+		[FailsOnWindows("Currently fails on Windows; see https://github.com/dotnet/maui/issues/24482")]
+		public void CarouselViewShouldScrollToRightPosition()
+		{
+			App.WaitForElement("goToLastItemButton");
+			App.Click("goToLastItemButton");
+			App.WaitForElement("5");
+			App.Click("reloadItemsButton");
+			App.WaitForElement("5last");
+			VerifyScreenshot();
+		}
+	}
+}
+#endif