I’m not sure why this is happening. I tried deleting my photos and emptying the deleted photos file. I also deleted all shared albums etc. there’s literally nothing on my photo album. This issue existed before I updated to iOS 14.4.2 and persists since the update just ten minutes ago.
Do you have any advice?
Settings > General > reset > erase all content and settingsand wipe the phone. Once that is done restore from the backup. As temporary/cache files are not backed up or restored that should do it. – Steve Chambers Apr 12 '21 at 12:59