Navigation only works in Debug and Release mode?

Hi All,

i have discovered a very strange problem or behavior of xamarin.forms for me. The problem is navigation only works in debug or release mode, as soon as I create an APK (archive) navigation doesn't work anymore. I cut my code down to a minimun (only looks big by the CommandCanExecute part) I have no idea why this run fine in debug and release mode but if its packed up it wont, i don't even get an exception thrown

// App
public App() {
InitializeComponent();
MainPage = new NavigationPage(new Views.MainPage());
}

// MainPage
public partial class MainPage : ContentPage {
    MainPageViewModel viewModel;
    public MainPage() {
        InitializeComponent();
        viewModel = new MainPageViewModel(this, Navigation, ScrollViewLog);
        BindingContext = viewModel;
    }
}

// MainPageViewModel
public class MainPageViewModel : INotifyPropertyChanged {

    // property
    private bool openOptionsPasswordCheckCommandCanExecute = true;
    public bool OpenOptionsPasswordCheckCommandCanExecute {
        get { return openOptionsPasswordCheckCommandCanExecute; }
        set {
            openOptionsPasswordCheckCommandCanExecute = value;
            ((Command)OpenOptionsPasswordCheckCommand).ChangeCanExecute();
        }
    }

    // command
    public ICommand OpenOptionsPasswordCheckCommand { get; private set; }

    // fields
    private INavigation navigation;

    // construct
    public MainPageViewModel(INavigation navigation) {
        this.navigation = navigation;
        OpenOptionsPasswordCheckCommand = new Command(async () => await OpenOptionsPasswordCheckCommandAction(), () => OpenOptionsPasswordCheckCommandCanExecute);
    }

    // the navigation
    private async Task OpenOptionsPasswordCheckCommandAction() => await NavigateToOptionsCheckPassword();
    public async Task NavigateToOptionsCheckPassword() => await navigation.PushAsync(new OptionsPasswordCheck());

    // even if I not use the passed Navigation object it won't work -->
    // Application.Current.MainPage.Navigation.PushAsync(new OptionsPasswordCheck()); // navigation.PushAsync(new OptionsPasswordCheck()
}