Adobe Bridge 14.1.1.274 Cannot Add Keyword to an MP4 Being Played by a Separate Media Player.

Repro steps on Windows 11:
(1) Open an MP4 for viewing with a media player (e.g. VLC) to identify people in the clip.
(2) Open Adobe Bridge 14.1.1.274 to add names of those individuals as keywords to the same clip.
Observed Adobe Bridge behaviors:
* Checking one keyword will uncheck the previously checked keyword (quietly).
* Checked keyword is not saved by Adobe Bridge after program exit (again quietly).
* User is not warned of any of the above behavior.