I'm helping someone set up a new iPhone 12 and after doing most of the steps to get set up on the new phone from the old one, after getting to the "Updating iCloud settings…" section it immediately goes to the lock screen. If you unlock, you see the Updating iCloud settings… part again and it quickly reverts to the lock screen. I've already had them try a restart but I'm not sure what else to do. Does anyone know what's happening here?