I have the same issue. iPhone 7, worked great with iOS 14 but I 'upgraded' to iOS 15.4 and also upgraded Xcode to 13.3 and I just get an endless 'waiting' message for the phone. I have rebooted everything, reinstalled iOS on the phone several times, nothing has helped. (It sure would be nice if Apple had a way for us to install old version of iOS on a device. Not everyone can afford to leave a dev phone on an old OS release when so many new releases come out. Then I could have fixed this problem in an hour instead of wasting the better part of an day on it.)

We are having the same issue with a Collection View Cell. The cell can be collapsed or open and auto layout only does open. (Obviously since it is using all of the text.) I thought we cold use sizeThatFits(...) to override the auto layout for the closed case, but it never gets called. It's one of the last things we need to fix to support dynamic text sizes. Has there been an answer for this somewhere, or is there a better way to limit the collection view flow layout?