Casual use indicates that this bug is fixed in chromium version 83.0.4103.116-1~deb10u1, which is now in the stable repos.
I didn't see the merge with bug# 949440 and so never tried the work-around and can't confirm one way or the other whether it solved this problem. Regards, Karl <k...@karlpinc.com> Free Software: "You don't pay back, you pay forward." -- Robert A. Heinlein