COMException issue in IAsyncCommand (ValueTask Method) NavigateViewModelAsync when migrating from Uno 6.5.36 to 6.6.29 or higher

[luckypong]

Extensions was updated from 7.1.4 to 7.2.3; were any changes made in relation to this?

In SDK 6.6.x, calling it with a button Command results in the following exception.

Uno.Extensions.Navigation.Navigators.FrameNavigator: Warning: CoreNavigateAsync - Region '' has no children to forward request to (route: '', view loaded: True)
08-16 20:56:32.266+09:00 W/Uno.Extensions.Navigation.Navigators.FrameNavigator: CoreNavigateAsync - Region '' has no children to forward request to (route: '', view loaded: True)

08-16 20:57:42.965+09:00 I/Uno.Extensions.Navigation.Navigators.FrameNavigator: NavigateAsync - Starting Navigation - Navigator: FrameNavigator Request: Second

A - EXCEPTION [SignUpClicked] EXCEPTION Thread=12 Type: System.Runtime.InteropServices.COMException
HResult: 0x8001010E
Message:
StackTrace:
at WinRT.ExceptionHelpers.g__Throw|38_0(Int32 hr)
at ABI.Microsoft.UI.Xaml.IFrameworkElementMethods.get_IsLoaded(IObjectReference _obj)
at Microsoft.UI.Xaml.FrameworkElement.get_IsLoaded()
at Uno.Extensions.Navigation.Navigator.CoreNavigateAsync(NavigationRequest request)
at Uno.Extensions.Navigation.Navigator.CoreNavigateAsync(NavigationRequest request)
at Uno.Extensions.Navigation.Navigators.ControlNavigator.CoreNavigateAsync(NavigationRequest request)
at Uno.Extensions.Navigation.Navigator.RegionNavigateAsync(NavigationRequest request)
at Uno.Extensions.Navigation.Navigator.NavigateAsync(NavigationRequest request)
at Uno.Extensions.Navigation.Navigator.NavigateAsync(NavigationRequest request)
at UnoApp6.Presentation.MainModel.GoToSecond() in C:\Users\USER\source\repos\UnoApp6\UnoApp6\Presentation\MainModel.cs:line 44

I wonder if this is an intended action.

UnoApp6.zip

Uno SDK 6.5.36 and 6.6.x
Windows App