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I've had it running now for 5 minutes and it's now consumed 4.8GB of RAM (Simulator) and still going. If this was a real device it would have simply crashed ages ago... with my users losing inputted data potentially. So now that it's RC, are you saying this is not a problem Apple? NOBODY has replied to me in my Feedback about this. Where do I turn now??

@talking_small - Thanks for the offer, but I did submit what they asked for here to the Feedback report, but nobody has replied to that Feedback at all and no requests have been asked there... I'm still waiting for ANYONE from Apple to reply! Sadly, I don't have the time (nor ability) to implement my own syncing solution, so basically Apple breaking NSPersistentCloudKitContainer has broken my app... and that is really disappointing. I might have to stop offering the iPad & Mac versions now. @Alex_Vorobiev - My Development & Production Environments have not changed and are all in sync, with no missing fields - and my App Store app syncs fine on iOS 14 devices. Any devices running iOS 15 see it fail. I'm not even talking about the failures I'm seeing building an App in Xcode - this is with my current in-the-wild App that has been unchanged for several months. My database is 'complex' but that was the whole point of NSPersistentCloudKitContainer - to sync a Core Data store. If it can't do that properly, then they shouldn't offer it at all. It's always worked fine though with my data... except since iOS 15 beta 4. Apple definitely broke something. I've now submitted a TSI as Apple has released the RC version of iOS15 as I feel this is the only way anyone from Apple will communicate with me about this...

This is interesting, and concerning. The Apple Engineer states “You cannot mix applications built against the iOS 15 SDK with iOS 14.* devices or simulators.” Which is all fine & dandy… BUT I’m seeing sync failures with an existing App Store App (built with iOS 14 SDK months ago) failing in the same way. This is a deep OS level change which affects older applications and that is why I’m so concerned. Existing, working apps are going to break in a few days.

If I get a reply from my TSI I’ll report back here

Yeah, there is something still broken deep down with CloudKit since beta 4. As it's now RC I've submitted a TSI with Apple to (hopefully) get some one-on-one interaction with SOMEONE at Apple.

Thanks for the reply - I wait with bated breath as I'm starting to get complaints from my users!!🤞🏼😬

Thank you - downloading now! Will report back soon 😬

Still broken in 15.1 running my App Store version of the app (no development builds)... 😞 Even deleting the iCloud data, deleting the apps & reinstalling them from the App Store didn't solve the issue. As soon as I ingested the backup file, and saved the context, as sync was started... and nothing happens. Then after a minute or two, the app is booted to springboard. Same problem. As there is no 13.1 Xcode I can't test this on a build against the iOS 15 SDK but an iOS14 SDK app (ie. in the App Store) when running on 15.1 still fails.

(unless we're out-of-sync here and you're referring to the second 15.1 beta as the 'next iOS 15.1 beta seed'??) I do hope that's the case.

If the problem is related to the problem I and others are having (and I think it is) then the last update from a 'Framework Engineer' suggested that the 'next 15.1 beta' will fix the issue. I initially misinterpreted this as the first 15.1 beta as I had not yet noticed there was one, but I think they mean it will be fixed in iOS 15.1 beta 2 which should be out any day now. I really, really, really hope they've fixed these CloudKit/Core Data issues as it's having an impact on my users' data already. Fingers crossed that it will all start syncing again normally when 15.1 is released to the public!!

I should add that my TSI received a reply effectively saying what the Framework Engineer said on these forums - wait for 15.1 beta 2 (and Monterey beta 8)

Still broken in 15.1 beta 2 (see below)

Still broken in 15.1 beta 2...

It's the same (de-identified) backup file I've sent previously (to my Feedback FB9412346). The biggest frustration is that there is no conversation going on in that Feedback thread of mine - I feel like I'm yelling into the void - so I have to keep coming back here for any interaction with Apple - thank you at least for replying here! I just need someone at Apple to download my app, restore that backup file, and observe what (doesn't) happen(s). Even in my TSI I've only received vague replies such as 'it will be fixed in beta 2' but I'm not able to engage with anyone directly to get to the bottom of this quickly. My issue is that this 'backup restore' and subsequent sync to iCloud worked just fine in iOS 15 beta 3 and before (iOS 13 & iOS 14) so something changed... and my app didn't (at least none of that code). It's the same version that's been syncing for a year on iOS 14, etc. If my app no longer syncs, it's going to be the end of it unfortunately. 😔