[C# Markup] ItemsRepeater crashes when used with ItemTemplateSelector

[kucint]

ItemTemplateSelector works fine with ListView, but it crashes with ItemsRepeater:

public sealed partial class MainPage : Page
{
    public MainPage() => this
        .DataContext(new BindableMainPageModel(), (page, vm) => page
        .Background(ThemeResource.Get<Brush>("ApplicationPageBackgroundThemeBrush"))
        .Content(new StackPanel()
        .VerticalAlignment(VerticalAlignment.Center)
        .HorizontalAlignment(HorizontalAlignment.Center)
        .Children(
            new TextBlock()
            .Text("Hello Uno Platform!"),
            //new ListView()                             // ItemTemplateSelector works fine with ListView
            new ItemsRepeater()                          // but it crashes with ItemsRepeater
            .ItemsSource(() => vm.Items)
            .ItemTemplateSelector<Item>((item, selector) => selector
                .Default(() => new TextBlock().Text("def"))
                .Case<ItemA>(itemA => new TextBlock().Text("a"))
                .Case<ItemB>(itemB => new TextBlock().Text("b"))
        )));
}

on net8.0-desktop;
An exception of type 'System.ArgumentException' occurred in Uno.UI.dll but was not handled in user code

on net8.0-windows10.0.19041:
An exception of type 'System.InvalidCastException' occurred in WinRT.Runtime.dll but was not handled in user code

"Uno.Sdk": "5.2.175"

  <PropertyGroup>
    <UnoExtensionsVersion>4.1.24</UnoExtensionsVersion>
    <UnoToolkitVersion>6.0.18</UnoToolkitVersion>
    <UnoThemesVersion>5.0.13</UnoThemesVersion>
    <UnoCSharpMarkupVersion>5.2.14</UnoCSharpMarkupVersion>
  </PropertyGroup>

repro: UnoTemplateSelectorApp.zip

[MartinZikmund]

Can you please look into this @dansiegel?

[dansiegel]

Was actually already looking into this... this has been moved to an issue. @kucint please look for updates there.
#2407