Reclustering of faces not working

I uploaded a series of photos in March then did another bulk upload today. Immich recognized faces were present in all new photos, but was not pairing the faces with established ones (where there were thousands of the same face). I ran Jobs -> Face Detection then Jobs -> Facial Recognition, but faces weren't merged. It seems to require manual grouping of new with old (where the face is straight on and 'easy' to recognize. What am I doing wrong (1.135.3)?
Was this page helpful?