ApplicationSession.GetUserTimeline crashes with NPE

[ApprKal]

Using Xamarin 3.9.483.0 with Xamarin.Android 4.20.0.37 and BoxKite.Twitter 2.2.2 and ApplicationAuth

In release, the line:
ApplicationSession.GetUserTimeline(TwitterHandle, 0, 0, 0, 90)
crashes with a Null Pointer Exception, whereas in debug twitter posts load normally.

Also worth noting, in debug, the line:
await ApplicationSession.StartApplicationOnlyAuth()
never returns. However, in release, it returns true.

[ApprKal]

Turning Linker off fixes this issue (though obviously this is not a solution).