Mixing a CocosSharp game with UIViewControllers

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I'm creating a CocosSharp game with several additional native screens which I'm going to implement using native iOS UIViewController. The flow is the following:

  1. On app startup I'm creating UINavigationViewController and initial view with my custom main menu:

    public override void FinishedLaunching(UIApplication app)
    {
        MainWindow = new UIWindow(UIScreen.MainScreen.Bounds);
        var rootViewStoryboard = UIStoryboard.FromName("GameMenu", null);
        var rootView = rootViewStoryboard.InstantiateViewController("GameMenu");
        var navigationController = new UINavigationController(rootView);
        MainWindow.RootViewController = navigationController;
        MainWindow.MakeKeyAndVisible();
    }
    
    public partial class GameMenu : UIViewController
    {
        public GameMenu(IntPtr handle)
            : base(handle)
        {
        }
    
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            btnStartGame.TouchUpInside += (sender, e) => NavigationController.PresentViewController(new GameScene(), false);
        }
    }
    
  2. One of the actions leads to another UIViewController (modal) where CocosSharp game is created:

    public partial class GameScene : UIViewController { public GameScene() { }

    public override void ViewDidLoad()
    {
        base.ViewDidLoad();
        _application = new CCApplication();
        _application.ApplicationDelegate = new GameAppDelegate();
        _application.StartGame();
        _application.MainWindow.DisplayStats = true;
    
        OnStopGame();
    }
    

    }

  3. Finally on certain event (in my case in 5 sec) I'm trying to finish a game and return back to the main menu:

    public async Task OnStopGame()
    {
       await Task.Delay(5000);
       _application.ExitGame();
       NavigationController.DismissViewController(false, null);
    }
    

As a result I get empty black screen, background music continue to run, no main menu is displayed.

How should I properly navigate from CocosSharp game to a native controller and back? Can they live in parallel?

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