Xamarin.Forms: 1.5.1.6471
OS: Android 4.1.1, API 16
As you can see in the picture:
The top three icons have an outline/shadow around them, even though it is disabled:
new Frame {Padding = new Thickness(10), Content = iIconImage, HasShadow = false, BackgroundColor = Color.Transparent, OutlineColor = Color.Transparent};
It works as intended on 5.1:
