Button greyed when using .NET MAUI Community Toolkit MVVM

Once clicked, a button turns from blue to grey and will not return to the original blue color.

I create a new .NET MAUI app and install CommunityToolkit.MVVM (V8.0.0). Then create a MainPageViewModel and hook it up to the MainPage View.

In the MainPageViewModel I have two [RelayCommand] methods. One is async and the other is not.

I add two buttons to the MainPage XAML and use the Command attribute to assign each of the 'RelayCommand' handlers to the buttons. The methods just dump to System.Diagnostics.Debug.

When I execute the app on Windows 10 and click the non-async button, I see the diagnostic dump and the button background color remains blue. i.e. the original color. i.e. this is the behavior I expect for both buttons.

When I click on the async button, I see the diagnostic dump but the button background color changes from blue to grey. The button is still enabled. If I click again, I see the diagnostic dump again.

How do I get the 'async' button back into the original state.

Snippet from the MainPageViewModel:

    public partial class MainPageViewModel : ObservableObject
    {
        [RelayCommand]
        async Task TestSomethingAsync()
        {
            await Task.Delay(1);
            System.Diagnostics.Debug.WriteLine(nameof(TestSomethingAsync));
        }

        [RelayCommand]
        void TestMore()
        {
            System.Diagnostics.Debug.WriteLine(nameof(TestMore));
        }
    }

Snippet from the MainPage.xaml:

            <Button
                Text="T1 Async"
                Command="{Binding TestSomethingCommand}"
                HorizontalOptions="Center" />
            
            <Button
                Text="T2"
                Command="{Binding TestMoreCommand}"
                HorizontalOptions="Center" />