Xamarin white screen bug in QR Scanner

When i open application its works perfect. But When i use my scan again button its stuck in white screen and its not passing until i press "Back" Button on my phone. How can i remove that white screen bug ? Its video about my bug : https://www.youtube.com/watch?v=k8-haOmCzm0 And its my codes : QR Code Scanner Code :

` public async void Scan()          {                var scan = new ZXingScannerPage();              await Navigation.PushAsync(scan);              scan.OnScanResult += (result) =>              {                  Device.BeginInvokeOnMainThread( () =>                  {                      Navigation.PopAsync();                      codes.Text = result.Text;                        Application.Current.Properties["codes"] = codes.Text;                      Navigation.PushAsync(new MainPage());                  });              };            }`  

My Scan again button Code :

  private void Button_Clicked_1(object sender, EventArgs e)          {              Navigation.PushAsync(new ScanPage());          }  

https://stackoverflow.com/questions/66484913/xamarin-white-screen-bug-in-qr-scanner March 05, 2021 at 08:14AM