Just a final update. Since 15.5 the NSPersistentCloudKitContainer syncing has been fast, and complete... and seems to now properly sync in the background without causing crashes. Finally... just before iO16 is announced! 🤣

Still no official word from Apple but all my testing with iOS 15.2 (beta 2) is showing it to be working as expected. Hopefully 15.2 will be released soon and this will be marked as resolved.

The official word from Apple is that it's still marked as 'unresolved' but it's quite possible that it has been addressed in the second beta of 15.2 but they're not yet 100% sure it's ready for release. Still... promising developments I think. 🤞🏻

Definitely seems to be resolved with this beta so the official 15.2 should hopefully fix the issue for all our users.

Thanks for posting @danmedia93 - Hopefully we'll see some resolution before the end of the year. I'm really keen to restart work on my update but don't want to touch a thing until this is fixed... it's breaking my existing app as it is!

Wow, that wasn't a swear word! Not sure why it was asterisked out! 😏

Oh, geez... that's not good. The moment I noticed this bug back in iOS15 beta 4 I thought it was a critical bug, but took a while to convince anyone. Still no further updates from Apple at my end but will post as soon as I have any updates. Thanks for submitting a parallel feedback report. Because this bug seems to appear only with complex Core Data structures, a lot of Developers are probably just not seeing it yet.