[BUG] UserStoppedTypingBehavior Command does not run on the MainThread

[aalsamoht]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

The Command is NOT executed on the MainThread.

<SearchBar.Behaviors>
  <toolkit:UserStoppedTypingBehavior
    BindingContext="{Binding Path=BindingContext, Source={x:Reference UserStoppedTypingSearchBar}, x:DataType=SearchBar}"
    Command="{Binding SearchCommand, Mode=OneTime}"
    StoppedTypingTimeThreshold="750"
    ShouldDismissKeyboardAutomatically="False">
  </toolkit:UserStoppedTypingBehavior>
</SearchBar.Behaviors>

[RelayCommand]
private void Search(string searchTerm)
{
  var mt = MainThread.IsMainThread;
  Debug.WriteLine($"Search: {searchTerm} - MainThread: {mt}");
  Console.WriteLine($"Search: {searchTerm} - MainThread: {mt}");
}

Expected Behavior

The Command is executed on the MainThread.

Steps To Reproduce

1. Open and run solution from reproduction repository.
2. Enter text in the search bar, wait for the Command to execute and check the output in Console or Debug - MainThread: False.

Link to public reproduction project repository

https://github.com/aalsamoht/MauiUserStoppedTypingBehavior

Environment

- .NET MAUI CommunityToolkit: 11.1.0
- OS: iOS & Android
- .NET MAUI: 9.0.202

Anything else?

https://github.com/CommunityToolkit/Maui/blob/main/src/CommunityToolkit.Maui/Behaviors/UserStoppedTypingBehavior.shared.cs#L133

This causes intermittent app crashes.