Android - Carousel View - always get an error "Can't set CarouselView to position -1. ItemsSource has 10 items."

### Description

I'm using the native CarouselView, and I keep getting this error when debugging.

_Can't set CarouselView to position -1. ItemsSource has 10 items._

I use service to catch unhandled exceptions and what it saved

### Steps to Reproduce

1. Create default ContenView.xaml
`

`

and cs file
`
public partial class MyCarousel : ContentView
{
private bool _isAdjustingPosition;

public MyCarousel()
{
InitializeComponent();
}

public static readonly BindableProperty ItemsSourceProperty =
BindableProperty.Create(
nameof(ItemsSource),
typeof(IEnumerable),
typeof(MyCarousel),
propertyChanged: OnItemsSourceChanged);

public IEnumerable ItemsSource
{
get => (IEnumerable)GetValue(ItemsSourceProperty);
set => SetValue(ItemsSourceProperty, value);
}

private static void OnItemsSourceChanged(BindableObject bindable, object oldValue, object newValue)
{
if (bindable is not MyCarousel carousel)
return;

if (newValue is IEnumerable items && items.Any())
{
carousel.Carousel.ItemsSource = items;
carousel.Carousel.IsVisible = true;
carousel.Indicators.IsVisible = true;

carousel.Dispatcher.Dispatch(() =>
{
carousel.TrySetInitialPosition();
});
}
else
{
carousel.Carousel.ItemsSource = null;
carousel.Carousel.IsVisible = false;
carousel.Indicators.IsVisible = false;
}
}

private void TrySetInitialPosition()
{
try
{
if (Carousel.ItemsSource is IEnumerable src && src.Any())
{
if (Carousel.Position < 0)
Carousel.Position = 0;
}
}
catch
{
// Ignore
}
}

private void Carousel_PositionChanged(object? sender, PositionChangedEventArgs e)
{
if (_isAdjustingPosition)
return;

if (Carousel.Position < 0)
{
_isAdjustingPosition = true;
Dispatcher.Dispatch(() =>
{
SafeSetPosition(0);
_isAdjustingPosition = false;
});
}
}

private void SafeSetPosition(int position)
{
try
{
if (Carousel.ItemsSource is IEnumerable src && src.Any())
{
Carousel.Position = Math.Max(0, Math.Min(position, src.Count() - 1));
}
}
catch
{
// Ignore
}
}`

### Link to public reproduction project repository

_No response_

### Version with bug

9.0.100 SR10

### Is this a regression from previous behavior?

Not sure, did not test other versions

### Last version that worked well

_No response_

### Affected platforms

Android

### Affected platform versions

Android 13

### Did you find any workaround?

No

### Relevant log output

```
System.IndexOutOfRangeException: Can't set CarouselView to position -1. ItemsSource has 10 items.
at void MauiCarouselRecyclerView.Microsoft.Maui.Controls.Handlers.Items.IMauiCarouselRecyclerView.UpdateFromPosition()() in MauiCarouselRecyclerView.cs:line 535
at void CarouselViewHandler.MapPosition(CarouselViewHandler handler, CarouselView carouselView)() in CarouselViewHandler.Android.cs:line 48
at void PropertyMapper.Add(string key, Action action)+(IElementHandler h, IElement v) => { }() in PropertyMapper.cs:line 244
at bool PropertyMapper.TryUpdatePropertyCore(string key, IElementHandler viewHandler, IElement virtualView)() in PropertyMapper.cs:line 64
at void PropertyMapper.UpdateProperty(IElementHandler viewHandler, IElement virtualView, string property)() in PropertyMapper.cs:line 115
at void ElementHandler.UpdateValue(string property)() in ElementHandler.cs:line 106
at void Element.UpdateHandlerValue(string property, bool valueChanged)() in Element.cs:line 693
at void VisualElement.UpdateHandlerValue(string property, bool valueChanged)() in VisualElement.cs:line 2018
at void Element.OnBindablePropertySet(BindableProperty property, object original, object value, bool changed, bool willFirePropertyChanged)() in Element.cs:line 651
at void BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, object value, bool currentlyApplying, SetValueFlags attributes, SetterSpecificity specificity, bool silent)() in BindableObject.cs:line 663
at void BindableObject.SetValueCore(BindableProperty property, object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes, SetterSpecificity specificity)() in BindableObject.cs:line 591
at void BindableObject.SetValue(BindableProperty property, object value)() in BindableObject.cs:line 496
at void CarouselView.set_Position(int value)() in CarouselView.cs:line 170
at void MauiCarouselRecyclerView.UpdateInitialPosition()() in MauiCarouselRecyclerView.cs:line 343
at void MauiCarouselRecyclerView.UpdateAdapter()() in MauiCarouselRecyclerView.cs:line 144
at void MauiRecyclerView, IItemsViewSource>.UpdateItemTemplate()() in MauiRecyclerView.cs:line 140
at void ItemsViewHandler.MapItemTemplate(ItemsViewHandler handler, ItemsView itemsView)() in ItemsViewHandler.Android.cs:line 79
at void PropertyMapper.Add(string key, Action action)+(IElementHandler h, IElement v) => { }() in PropertyMapper.cs:line 244
at void PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)() in PropertyMapper.cs:line 127
at void ElementHandler.SetVirtualView(IElement view)() in ElementHandler.cs:line 96
at void ViewHandler.SetVirtualView(IView view)() in ViewHandlerOfT.cs:line 53
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at void LayoutHandler.SetVirtualView(IView view)() in LayoutHandler.Android.cs:line 41
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at void ContentViewHandler.UpdateContent(IContentViewHandler handler)() in ContentViewHandler.Android.cs:line 42
at void ContentViewHandler.MapContent(IContentViewHandler handler, IContentView page)() in ContentViewHandler.Android.cs:line 47
at void PropertyMapper.Add(string key, Action action)+(IElementHandler h, IElement v) => { }() in PropertyMapper.cs:line 244
at void PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)() in PropertyMapper.cs:line 127
at void ElementHandler.SetVirtualView(IElement view)() in ElementHandler.cs:line 96
at void ViewHandler.SetVirtualView(IView view)() in ViewHandlerOfT.cs:line 53
at void ContentViewHandler.SetVirtualView(IView view)() in ContentViewHandler.Android.cs:line 26
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at void LayoutHandler.SetVirtualView(IView view)() in LayoutHandler.Android.cs:line 41
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at void ScrollViewHandler.UpdateInsetView(IScrollView scrollView, IScrollViewHandler handler, ICrossPlatformLayout crossPlatformLayout)() in ScrollViewHandler.Android.cs:line 205
at void ScrollViewHandler.MapContent(IScrollViewHandler handler, IScrollView scrollView)() in ScrollViewHandler.Android.cs:line 133
at void PropertyMapper.Add(string key, Action action)+(IElementHandler h, IElement v) => { }() in PropertyMapper.cs:line 244
at void PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)() in PropertyMapper.cs:line 127
at void ElementHandler.SetVirtualView(IElement view)() in ElementHandler.cs:line 96
at void ViewHandler.SetVirtualView(IView view)() in ViewHandlerOfT.cs:line 53
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at void LayoutHandler.SetVirtualView(IView view)() in LayoutHandler.Android.cs:line 41
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at void ContentViewHandler.UpdateContent(IContentViewHandler handler)() in ContentViewHandler.Android.cs:line 42
at void ContentViewHandler.MapContent(IContentViewHandler handler, IContentView page)() in ContentViewHandler.Android.cs:line 47
at void PropertyMapper.Add(string key, Action action)+(IElementHandler h, IElement v) => { }() in PropertyMapper.cs:line 244
at void PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)() in PropertyMapper.cs:line 127
at void ElementHandler.SetVirtualView(IElement view)() in ElementHandler.cs:line 96
at void ViewHandler.SetVirtualView(IView view)() in ViewHandlerOfT.cs:line 53
at void ContentViewHandler.SetVirtualView(IView view)() in ContentViewHandler.Android.cs:line 26
at void ViewHandler.SetVirtualView(IElement view)() in ViewHandlerOfT.cs:line 56
at void Element.SetHandler(IElementHandler newHandler)() in Element.cs:line 1034
at void Element.set_Handler(IElementHandler value)() in Element.cs:line 976
at void VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)() in VisualElement.cs:line 2137
at IElementHandler ElementExtensions.ToHandler(IElement view, IMauiContext context)() in ElementExtensions.cs:line 96
at View ElementExtensions.ToPlatform(IElement view, IMauiContext context)() in ElementExtensions.cs:line 127
at View MauiContextExtensions.ToPlatform(IView view, IMauiContext fragmentMauiContext, Context context, LayoutInflater layoutInflater, FragmentManager childFragmentManager)() in MauiContextExtensions.cs:line 96
at View NavigationViewFragment.OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)() in NavigationViewFragment.cs:line 56
at IntPtr Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle_(IntPtr jnienv, IntPtr native__this, IntPtr native_inflater, IntPtr native_container, IntPtr native_savedInstanceState)() in C:\a\_work\1\s\generated\androidx.fragment.fragment\obj\Release\net8.0-android\generated\src\AndroidX.Fragment.App.Fragment.cs:line 2045
at IntPtr JNINativeWrapper.Wrap_JniMarshal_PPLLL_L(_JniMarshal_PPLLL_L callback, IntPtr jnienv, IntPtr klazz, IntPtr p0, IntPtr p1, IntPtr p2)() in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 363
```

Start with MauiCarouselRecyclerView.cs at UpdateInitialPosition, UpdateAdapter, and UpdateFromPosition, then inspect CarouselViewHandler.Android.cs at MapPosition. Reproduce the ContentView example on Android 13 with ten items and trace when Position becomes -1; done means the CarouselView initializes without the IndexOutOfRangeException and retains a valid position.

Written by the indexing model from the issue text.