Exceptions and poor performance with .net native

Hello!
We have Xamarin.Forms PCL application that works great on iOS but after building it for UWP with .net native compiler it throws all kinds of exceptions and performance is very bad on ARM, on x86 and x64 it's a lot better. Exceptions are very vague and don't provide any useful info, I assume that it's caused by some package compatibility issue but the question is how to identify the source of the problem?
Screenshots from debug output running .net native build: (PlatformNotSupported exceptions get thrown when loading any page)