Created attachment 25086 [details]
I found a problem with the "ProgressBar" on Android 5.0.1 - The fill color of the bar is not visible.
<ProgressBar x:Name="prgLivello" VerticalOptions="CenterAndExpand" Progress="0.5" Grid.Column="1"/>
Compile with Visual Studio (Xamarin.Android_7.4.0);
Compile using Android version: Android 7.1;
I can't reproduce this on a 5.0.2 emulator (I understand it isn't 5.0.1, but should be close enough) with 2.4. Can you please upload a reproduction project?
Closing due to no response. Please refer to the above comment and provide a reproduction if this is still occurring as of the latest stable and/or prerelease builds of Forms.