Thanks a lot for the detailed examination! I have created a minimal repro, and a bug report with id FB17715303.

Thanks a lot for the detailed investigation! I have created a minimal reproduction and a bugreport with id FB17715303.

Thanks a lot for the investigation / explanation! I have created a minimal reproduction and a bugreport with id FB17715303.

That is bad news for us :( Thanks for your help anyway! If sharing the documentation is not possible publicly, we would also be interested in documentation for a fee or some partnership, signing a contract or such. I have turned to the forum after it has been suggested by Apple Developer Support - Development and Technical (Case 102570857971). I have also filed a bug (FB18202770) hoping the best :)

Are you aware of any planned target date for the fix? Just asking because we are not aware of a workaround, so the problem is a release stopper for us. (And it would be good to tell some approximation for our customers.) Thanks in advance if you have any info!