I am not sure what changed, but my UWP Release mode builds won't run anymore. It is complaining about:
System.Reflection.MissingRuntimeArtifactException: Cannot retrieve a MethodInfo for this delegate because the method it targeted (System.Runtime.InteropServices.WindowsRuntime.ICommand_CCWAdapter.<>c__DisplayClass1_0.<add_CanExecuteChanged>b__0(Object, EventArgs)) was not enabled for metadata using the Dynamic attribute.
I have never had to modify the Default.rd.xml file before, but I guess I have to? Or did something change and now there is a bug in UWP Xamarin.Forms?