nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqypxulteg7hlwmfja0vmxk95qdckqh5m7tnlxz3zc02qymn9qky5l7jya555 (nprofile…a555) I need to do a bit more experimentation, and it's a bit difficult to replcate once it's failed once. I think it happens once I use my Linux machine.
I have a Linux desktop syncing to a folder that is also synced to iCloud. I suspect it's an issue with syncthing confusing iCloud, but so far only journelly seems infected. I'll keep experimenting; I now know there's a syncthing client for iOS so I might use it instead.