Seeing the same using Xcode RC and the release version of iOS 16. All built using the Release settings. On top of the timer not counting down, the Text view element seems to take up any horizontal space that it can. Center alignment in VStacks no longer work as a result. Filed a bug report and hopefully this gets fixed soon.

I had the same error and fixed it. The cause on my project was that I accidentally called performChangesAndWait inside another performChanges (the latter is for creating a photo; the former is for creating an album to add the new photo to). Once I un-nest the call blocks they work fine.