I've been noticing that many (but not all) context menus are deciding to scroll their content when they shouldn't be, filling the area that should be occupied by content with whitespace. For example, in pluma's side pane:
When I hover over the arrow for a couple seconds, I get the desired outcome:
Notice that the menu isn't changing size; the content is just scrolling down to fill empty space. The problem is more noticeable in a long menu like GIMP's:
Is this a known issue? A couple minutes of Googling doesn't turn anything up. What can I try to fix it?