Tool Options menu bar sometimes gets stuck on screen
GIMP version: 2.10.14
Operating System: macOS Catalina 10.15.5
Package: download from gimp.org
Description of the bug
Sometimes a rectangle with the text "Tool Options" and an icon gets stuck in the upper-left corner of my screen. The only way to get rid of it is to close Gimp. This rectangle covers the menu bar for all programs (not just Gimp) so it is fairly disruptive, since I can't access menus, even to close Gimp. (If anyone needs to use the menu after this problem occurs, the trick is to go to an unobscured menu item and then use arrow keys to get to the desired menu item.)
I don't know specifically what triggers this, but it happens regularly. I use the Tool Options and Layers menus a lot, switching between them, so there's probably something that triggers it.
Reproduction
Is the bug reproducible? Happens randomly, every few days.
Additional information
I don't think there's enough information here to fix this. Hopefully someone else has seen this problem and can provide more details.