Got it, thank you for the response! Can you confirm when I would change the environment to Environment.PRODUCTION? I'm guessing that I'll leave it as Environment.SANDBOX until after the App Review, and then change it to Environment.PRODUCTION before launching? Since it is a server-side change, it won't need a further App Review. If that's the case, what do I do for subsequent App Reviews?

Only Apple engineers can open those links. If you or anyone reading this is experiencing this same issue, please file a feedback report! File here: https://feedbackassistant.apple.com When you file your report, include whatever information you can and also reference the original feedback report (FB16712454) or at least link to this thread. Which technology does your report involve? -> SwiftData. What type of feedback are you reporting? -> Incorrect/Unexpected Behavior.

@DTS Engineer Can you share any updates? I filed a feedback about a month ago and haven't heard anything. I just need to decide if I need to move away from SwiftData or if a fix is pending, since I can't use it in production if you can never migrate without this crash. Thanks.