Masking problem

In Lightroom Mobile I've been having this problem for months. When I auto mask the subject it creates what appears to be the shape of a woman. When I auto masks the background it inverts this shape. It happens on numerous photos, and it's always the same exact shape.
I also have Lightroom classic and this does not happen.
Things I've tried:
Closing and reopening LR mobile
Starting from scratch
Uninstalling and reinstalling
Logging out and back in
Checking to make sure I have no other existing masks.
Making sure presets have no existing masks
Not using any presets
Any help would be very much appreciated!
