I've got a ControlTemplate which does not display it's Background Color. I don't set anything in code or at other positions so I'm completly confused about this.

The ControlTemplate:

<ControlTemplate  ... >

<RelativeLayout BackgroundColor="Green">



    <Grid BackgroundColor="Black"

          RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent,Property=Width,Factor=1,Constant=0}"

          RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent,Property=Height,Factor=1,Constant=0}">

        <Grid.RowDefinitions>

            <RowDefinition Height="*" />

            <RowDefinition Height="auto" />

            <RowDefinition Height="*" />

        </Grid.RowDefinitions>



        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="*" />

            <ColumnDefinition Width="auto" />

            <ColumnDefinition Width="*" />

        </Grid.ColumnDefinitions>



        <ContentPresenter Grid.Row="1"

                          Grid.Column="1" 

                          BackgroundColor="Blue"/>



    </Grid>



</RelativeLayout>

</ControlTemplate>

And the View:

<ContentView ...

    ControlTemplate="{x:TemplateBinding templates:OverlayViewTemplate}">



<ContentView.Content>



    <Grid x:Name="GrdBase"

          BackgroundColor="White"

          VerticalOptions="Center"

          HorizontalOptions="Center">



        <Grid.GestureRecognizers>

            <TapGestureRecognizer Command="{Binding ClickCommand}" />

        </Grid.GestureRecognizers>



        <Grid.RowDefinitions>

            <RowDefinition Height="auto" />

            <RowDefinition Height="10" />

            <RowDefinition Height="auto" />

        </Grid.RowDefinitions>



        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="100" />

        </Grid.ColumnDefinitions>



        <StackLayout Grid.Row="0"

                     Grid.Column="0">

            <Label x:Name="LblTest"

                   Text="Hello Xamarin.Forms!" />

        </StackLayout>

    </Grid>



</ContentView.Content>

</ContentView>

Do I miss something here or is a Template unable to render a background color?

Edit

After a lot of testing around, I found out that the Template is not used by the ContentView. Even if I define the template inside my App.xaml and referencing it via ControlTemplate="{StaticResource ViewTemplate}". I have got an other Template which is used by my pages and this works with no issue, so is there a bug when using it with a View?