Since updating to iOS 11, Photos has been behaving strangely. My settings for iCloud Photos are blank
My photos are endlessly re-uploading (even though they are all already in the cloud):
Worse — or at least further unnerving, if the upload is actually doing something — this upload pauses itself after a period of about an hour (without notice) and needs to be manually restarted to proceed.
(In contrast, Google Photos, which syncs with the same library on my iPhone, seems to be working fine.)
Why are my Photos settings blank? Why is my photo library being (re)uploaded to iCloud?