Yes, it does come down to that. ðŸ˜
I have located a zillion articles about people having the very same issue. When the old 4s started doing a similar thing last night, so I signed out of everything on that guy. Since the prompt was to "update" my password on the 6s and that's what was done, something is awry.
Perhaps I will start from scratch on the phone and see if it does persist. If it does, I believe Apple will give me a new phone, we can try that and if THAT doesn't work I can let enginerring troubleshoot the account.
Thing is, it's doing SOMETHING because when I do sign in per the prompt, it will alerts the other devices. So far, the Mac is behaving so I hate to think it's the actual account.
I'll keep you posted - the Apple theory is that the older software from the 4s couldn't translate to the 9.1 6s. I restored from the 6s back up - but didn't erase it first.But Apple did. And it failed. I've never synch'd over media before. See what I don't know? All Apple here and I don't know that? So sad.
Got a phone big enough to enable iCloud Photo Library and iCloud misbehaves! Or the phone... stay tuned and thank you!
I don't know all the things...
Thank you!