Hello! This is a hardware-specific issue, where it works on some Macs and doesn't on others :( With each fix we're getting closer to fixing it for everyone, but we aren't there yet still. It's complicated by the fact that our normal debugging tools don't help us in this case. Very considerable resources are invested into this problem, with numerous hardware units being bought to the studio for testing, but sadly complete solution of the problem still eludes us. For now can only express hope that the team manages to nail it down soon :( I know how frustrating it must be at this point.