My "People" tab shows (0) for everyone

[Mark Swan]

Currently using 8.5.0.  In some version prior to this one, within the last two years, I had done extensive work to assign names to faces.  Clearly, I have not looked at my “People” tab in a few months because I just noticed that every person listed had a “(0)”, meaning that the person’s face is not in any images.  There are thumbnails for each person, though.

I started a full “Detect faces” then “Recognize faces” and it is starting to repopulate each person.  Many people now look like they have “confirmed” images and also “new” images that I will go through and confirm or deny.

Any idea what would have wiped out these assignments?

Mark