I noticed another issue on iOS 11 that I think is related to the Apple ID issues. I went to use Apple Pay the other day at Staples and it came up Card Error. So I thought nothing of it, so today I went to McDonalds and tried it again, same Card Error. So I went home, removed and re-added my card. Tried using it at Walgreens and Card Error again. And my Walgreens card did the same thing when I went to scan it from my Passes. I'm thinking this is related to the password loop when you go to view your Apple ID and the TestFlight staying on Sign-In. Apple has a major bug it may look like... And it needs fixed ASAP.