Lightroom Classic face identification accuracy is much reduced over recent versions. Most faces are showing as not identified.

Lightroom Classic 15.1.1 on MacOSX with 56,000 images.

I have been using LRC facial recognition for years, with photos from a variety of different ages and camera sources. A few years ago, LRC was very good at identifying people even as they aged or from unusual angles. This behaviour has noticeably downgraded in 2025/2026. Faces are being shown as ‘unnamed’ even though they are of people who already have 5,000 previously identified examples.

Previously, at load time, almost all new faces were being named, even if some of the identifications were incorrect. Currently, almost all new faces are unnamed. It has become so uncommon that I am surprised when occasionally my own face is correctly identified.

Has there been a change in the algorithm, and if not, is there something that I can do to get the naming function to work properly again in my installation? I have tried ‘Find Faces Again’ but it just redraws the face region without making a better identification.