Scrivener 3.1.5 glitches when entering Composition Mode on MacOS Catalina 10.15.3

Hi,
I’ve noticed an unpleasant flickering glitch when entering composition mode today. I almost never use composition mode, so not sure whether it’s recent.
It’s not a big deal, for me, but I thought you might want to know, in case it’s not just my machine (haven’t noticed other apps glitching).
Thanks!