TapGestureRecognizer on Map. I'm I actually this dumb?

I've dropped a TapGestureRecognizer onto a Map in hopes of being able to trigger a legend_close method. It doesn't trigger (iOS or Android).

    <AbsoluteLayout VerticalOptions="FillAndExpand"
                    HorizontalOptions="FillAndExpand">
        <renderers:OutageMap x:Name="OutageMap"
                             MapType="Street"
                             IsShowingUser="False"
                             HasZoomEnabled="True"
                             EnablePolygons="{Binding EnablePolygons}"
                             OutageSource="{Binding Outages}"
                             AbsoluteLayout.LayoutBounds="0, 0, 1, 1"
                             AbsoluteLayout.LayoutFlags="All">
          <renderers:OutageMap.GestureRecognizers>
            <TapGestureRecognizer Tapped="OnMapTapped_CloseLegend"></TapGestureRecognizer>
          </renderers:OutageMap.GestureRecognizers>
        </renderers:OutageMap>
      <controls:_OutageLegend AbsoluteLayout.LayoutBounds="0, 0, -1,-1"
                                AbsoluteLayout.LayoutFlags="PositionProportional"
                                x:Name="LegendContainer" />
      <ActivityIndicator IsRunning="{Binding IsBusy}"
                         IsVisible="{Binding IsBusy}"
                         AbsoluteLayout.LayoutBounds="0.5, 0.5, -1,-1"
                         AbsoluteLayout.LayoutFlags="PositionProportional"/>
    </AbsoluteLayout>

Since a map tracks touches in other ways, is this just not possible? I've looked around a bit, and the only thing I've found is an old bug in a NEEDINFO state.