I am also here because of the pointer in that thread. This problem has been ongoing for all of the 16.1 beta tests and as a result I am not getting any symbolication. This makes debugging very hard. FB14854987

Yep, I just started on work for a new app and I think this change just reinforces that I should not be using Core Data. Core Data has had so many problems in the past that now it is just not worth it. I guess this could be a prelude to replacing Core Data with Core Data2, but who knows. By the time we figure it out, we will have already moved on.