Metadata is sometimes deleted when assigning keywords

SOmetimes when applying Assigned Keywords to multiple files, almast all metadata in the selected files gets nuked (Caption, Location, Copyright etc.) and only a few keywords assigned remains. This happens sporadically. Doing a purge doens reveal/redisplay the lost metadata, they truly are gone.

It happens in Bridge 2021 and 2022, running Mojave and Catalina (various versions). I've tried to reset pref's as well, no change.

Kind of unsettling that metadata just gets nuked like this, the only solution so far is to not use Bridge, but Photo Mechanic instead.

Any solutions or suggestions here in community-land?

All the best

Michael