Xamarin Forms - attempt to dismiss modal view controller whose view does not currently appear

Question

I am using Xamarin.Auth using Xamarin Forms. On IOS, When Auth Completion event fired and I got access tocken ,

I need to Pop the current Page and need to push another

                    await  navigation.PopModalAsync();

                    if(IsAuthenticated)
                    {
                        await navigation.PushModalAsync (new Handshake.Shared.Pages.TemplateSelectionPage());                       
                    }
                    else
                        await navigation.PushModalAsync (new Handshake.Shared.Pages.LoginPage());

I got this error in Application Output :

attempt to dismiss modal view controller whose view does not currently appear. self = <Xamarin_Forms_Platform_iOS_PlatformRenderer: 0x7c7b3de0> modalViewController = <Xamarin_Forms_Platform_iOS_ModalWrapper: 0x7c7bb310>