ImageFill not rendering on top of MapView

General
1

Hello! How come Image renders on top of MapView but ImageFill inside a Rectangle doesn’t?

<App Background="Black">
  <NativeViewHost Width="100%" Height="100%">
    <Panel>
      <Image File="close.png" Width="70" Height="70" Alignment="TopCenter" />
      <Rectangle Width="70" Height="70" Alignment="BottomCenter">
        <ImageFill File="close.png" StretchMode="UniformToFill" />
      </Rectangle>
      <MapView Latitude="59.911567" Longitude="10.741030" Zoom="10" />
    </Panel>
  </NativeViewHost>
</App>
2

What happens if you wrap the Rectangle in a GraphicsView?

3

Thank you!