Import to note the distinction between 'Scanning photos' and 'Updating People' – seems like these are two separate stages. My devices appear to have finish scanning photos but gets stuck updating People.
This has been happening to me since the iOS 11 public beta. Faces/People used to work fine, and now it seems to have scanned my entire library (no more "To continue scanning, lock your iPhone") however the message at the bottom of the People screen has read "To finish updating your people, lock your iPhone and connect it to power." for months.
I recently tried this:
- Backed up my iCloud Photo Library to a hard drive
- Removed all existing People from the album (i.e. Reset the People album)
- Turned off iCloud Library on my iPhone
- Waited for all photos in the cloud to disappear from my device, then manually deleted all photos stored locally
- Turned on iCloud Library on my iPhone
- Restarted the scanning process.
It completed, worked its way through about 15,000 images/videos. Still that message appears on all iOS and macOS devices using iCloud Library: "To finish updating your people…"
I have no idea what's happening, but I loved this feature and used it a lot. Super disappointed. It would make sense to me that this would be a server-side issue if all devices are showing it – so I'm holding off resetting my whole iPhone because I don't know what good it would do. Gonna contact Apple support about it soon, but not expecting much. Anyone actually tried that yet?