Detecting Gestures on XF Map Objects

I am not able to see gestures when applied to XF Map objects ( although they work fine with Images, Frame etc. ) . I am using XF and Maps v1.3.1. Here is the Xaml I am using - anyone else get this to work or having issues? ( also xmlns:maps="clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps")

    <maps:Map WidthRequest="300" HeightRequest="300"  Grid.Row="2" Grid.Column="0" x:Name="LaunchMap" IsShowingUser="true" MapType="Street" >
        <maps:Map.GestureRecognizers>
        <TapGestureRecognizer 
            Command="{Binding TapCommand}" 
            CommandParameter="Marker1" />
        </maps:Map.GestureRecognizers>
        </maps:Map>