Beam customizations don't scale when staff size changed.
OS: macOS 10.15, Arch.: x86_64, MuseScore version (64-bit): 220.127.116.1189, revision: 684f74e
In lengthy a score where I carefully adjusted many beams, via their handles, for the effect used in my published source, I found that they were not scaled when I subsequently chose a smaller basic staff size, resulting in chaos. I hope this is clear enough without images/scores (if not, I'll provide). I had to go back to my original staff size; at least that worked by virtue of the same!