I've been having a similar issue for the past 2 days. In my personal account and in the account of the company I work for. I checked PLA, it is signed.

Hello! I can't help with your problem but maybe you can help me. Am I right to understand that you have several targets in the app. They have access to a shared CoreData storage. And the synchronization with the iCloud works correctly? If so, can you share your class/structure to work with CoreData/CloudKit?