Issue with Face Recognition in Apple Photos

Hi everyone,

I'm experiencing a problem with the Photos app on my MacBook M2 Max running Sonoma 14.4.1, and I'm hoping someone here might have some insights or solutions.

In my photo library, I have around 19,000 photos and 1,400 videos. I've spent a considerable amount of time tagging people's faces with names, and until recently, the face recognition feature was working quite well. However, now it seems to have stopped functioning correctly.

Whenever I import new photos, after a couple of days when the analysis completes, all individuals are tagged as "Unnamed," even though there are numerous existing photos of the same people in my library.

Has anyone else encountered this issue? Are there any known fixes or workarounds that might help resolve this problem?

Thanks in advance for your help!