Xamarin Forms, szybkie naciśniecie przycisku powoduje otwarcie 2x tego samego okna.

Przy naciśnięciu szybko ikonki do przejścia do nowego widoku otwiera mi się dwa razy ten sam widok . I nie wiem jak sobie z tym poradzić aby otwierał jedynie jeden widok.

Przykładowy przycisk w xaml

 <local:AnimatedImage Grid.Column="2" Source="googlemap_view_search.png"
                        HorizontalOptions="Center" VerticalOptions="Center" Margin="16,0">
                    <Image.GestureRecognizers>
                        <TapGestureRecognizer Command="{Binding SearchCommand}" />
                    </Image.GestureRecognizers>
                </local:AnimatedImage>

Castomowa animacja przycisku

  public class AnimatedImage : Image
    {
		private const int ANIMATED_TIME = 100;
		private const double INITIAL_VALUE = 1;
		private const double MAGNIFICATION_VALUE = 1.3;
		
        public static readonly BindableProperty CommandProperty = BindableProperty.Create<AnimatedImage, ICommand>(p => p.Command, null);
		public ICommand Command
		{
			get { return (ICommand)GetValue(CommandProperty); }
			set { SetValue(CommandProperty, value); }
		}


		public static readonly BindableProperty CommandParameterProperty = BindableProperty.Create<AnimatedImage, object>(p => p.CommandParameter, null);
		public object CommandParameter
		{
			get { return (object)GetValue(CommandParameterProperty); }
			set { SetValue(CommandParameterProperty, value); }
		}

		private ICommand TransitionCommand
		{
			get
			{
				return new Command(async () =>
				{
					this.AnchorX = 0.48;
					this.AnchorY = 0.48;
					await this.ScaleTo(MAGNIFICATION_VALUE, 50, Easing.Linear);
					await Task.Delay(ANIMATED_TIME);
					await this.ScaleTo(INITIAL_VALUE, 50, Easing.Linear);
					if (Command != null)
					{
						Command.Execute(CommandParameter);
					}
				});
			}
		}

        public AnimatedImage()
        {
            Initialize();
        }

        public void Initialize()
		{
			GestureRecognizers.Add(new TapGestureRecognizer()
			{
				Command = TransitionCommand
			});
		}
	}
}

a korzystam w ViewModel z public DelegateCommand SearchCommand { get; private set; }