State of face recognition in digiKam?

[chimney at thespicers.net]

I'm trying to use face recognition in digiKam but am having no success. I
have run face detection across my whole collection of around 13,000 photos
using the default parameters (70%, not YOLO v3). This completed in a few
hours and successfully identified many faces. I then manually identified 14
new people from Unknown and assigned several faces to them - at least 5
faces for 8 of the people.

After this, I have tried using recognise faces, but the results are
extremely poor. Each time it runs, it basically assigns all faces to the
same one person and the vast majority of these are completely different
people that don't resemble them at all. I have not seen it ever assign
faces to any other person. The person that it choses has 28 manually
assigned faces that are correct.

It seems that digiKam simply isn't learning how to recognise faces. This
seems to closely match the experience described here:
https://bugs.kde.org/show_bug.cgi?id=444160#c10

I'm using the latest Windows 8.3.0 snapshot (04/02/2024 10:33).

Am I doing something wrong or is this feature simply not working at present?
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