PopModalAsync - Modal reappear after closing on iOS and WinPhone

Hi!

I have a Modal Page (a simple content Page) opened from a navigation page with Navigation.PushModalAsync(myModalPage).

When I close my Modal , it disappear and reappears on my screen...

Here's my code:

            myModalPage.OnClosePopUp += async (ss, ee) =>
            {
                await App.Navigation.PopModalAsync();                   
            };
            await App.Navigation.PushModalAsync(myModalPage);