I try to delete no more needed cover descriptions.
For that I select 2 tracks in my example and right click on the cover part in the left tag panel and choose Set cover description
from the context menu.
If I do not enter anything, I would assume that it would delete any existing entries.
This is currently not the case.
BTW: As far as I can see, we can't set any other text to multiple tracks at once too.
Should a deleted cover description for multiple selected files disappear immediately in the column view after pressing the OK-Button in the "Set cover description" window with the new version 3.14a?