Unexpected behaviour from TapGestureRecognizer

Today I found an issue with the GestureRecognizer and I'm not sure if this is a bug or just a layout problem.

I'm creating a card like layout for my app. It is pretty simple, it contains an Image and 2 Labels. To show the Image and one Label in one line I pack them into a StackLayout with Horizontal Orientation. Then I create a new StackLayout and add the layout and another label as Children.

public StackLayout CreateDashboardCard(string name, string icon, int itemsCount, double width = 250, double height = 150)
{
    var nameLabel = new Label
    {
        Text = name,
        FontSize = 20,
        HorizontalOptions = LayoutOptions.Center,
        VerticalOptions = LayoutOptions.CenterAndExpand
    };

    var iconToShow = new Image
    {
        Source = icon,
        HorizontalOptions = LayoutOptions.Start,
        VerticalOptions = LayoutOptions.Center
    };

    var itemsCountLabel = new Label
    {
        Text = _itemsCount.ToString(),
        FontSize = 30,
        HorizontalOptions = LayoutOptions.EndAndExpand,
        VerticalOptions = LayoutOptions.Center
    };

    var upperLayout = new StackLayout
    {
        HeightRequest = height - 30,
        Orientation = StackOrientation.Horizontal,
        BackgroundColor = Color.Aqua,
        Children =
        {
            iconToShow,
            itemsCountLabel
        }
    };

    var card = new StackLayout
    {
        Spacing = 10,
        WidthRequest = width,
        BackgroundColor = Color.Gray,
        HeightRequest = height,
        Orientation = StackOrientation.Vertical,
        Children =
        {
            upperLayout,
            nameLabel
        }
    };

    return card;
}

So nothing really fancy or complex.

In the ContentPage I create a DashBoardCard and add an TapGestureRecognizer.

var testCard = _dashBoardCards.CreateDashboardCard("TestCard", "userlist.png", 5);

var tapGestureRecognizer = new TapGestureRecognizer();
tapGestureRecognizer.Tapped += (sender, e) =>
{
    DisplayAlert("Test","test","Ok");
};

testCard.GestureRecognizers.Add(tapGestureRecognizer);

Now when I tap on the item only the nameLabel responds to the tap event.
In my understanding the hole DashBoardCard is a rendered StackLayout where I add the gesture recognizer to it or is that wrong?
Have someone experienced this too?