Another reason why we can’t have nice things.
My son's iPhone had access to some of our cloud media (TV) library, but not all of it. The UI looked like a mixture of age restricted on-device media, downloadable off-device media, on-device media missing normal display icons, and off-device media that wasn’t shown at all.
iTunes sync displayed odd alignments; it saw on-device media that did not show in iOS manage storage. His device requested App Store credentials multiple times, usually displaying the iOS 1 style dialogs seen when things are broken in iOS 9’s hacked together authentication frameworks.
An hour or so later things were more or less back to normal. Signing out of the App Store completely then re-authenticating might have helped. Or perhaps an old school iTunes sync or two. Or maybe an asteroid fly-by.
iOS flash style corruption? (There’s probably a reason Apple wants to retire HFS+ for something that’s Flash friendlier.) Problems with Apple’s DRM servers? Bugs in iOS? Bugs in iTunes?
Most likely all of the above. Sooner or later I’ll have to wipe and restore this phone, the iPhone equivalent of a visit to the dental hygienist. Reminds of me of Windows 95 really.
Modern bugs: emergent, complex, transient, common, and disruptive.