In the Xamarin.Forms documentation at https://developer.xamarin.com/api/member/Xamarin.Forms.ListView.ScrollTo/p/System.Object/Xamarin.Forms.ScrollToPosition/System.Boolean/
ArgumentException position contains an invalid value for ScrollToPosition.
Whilst this exception is thrown on Android, it is not thrown on UWP, giving the impression that things are working even though there is an issue in the application code. The UWP implementation should throw the exception as per the documentation.
This is using Xamarin.Forms 188.8.131.52
To reproduce, just pass a duff value for the first argument in
public Void ScrollTo (Object item, ScrollToPosition position, Boolean animated)
Confirmed still occurring in 184.108.40.206.
Should be fixed in 2.3.5-pre1