Flickering when mouseover on menu list
GIMP version: 2.99
Operating System: Ubuntu 18.04.1
Description of the bug
There is a flickering in the items from each menu when a mouseover is detected. The problem only appear for the item menu that can't expand.
For example :
If I over on file>new all the item will flicker but it will not occur on file>open (because the item is expandable ">").
Is the bug reproducible? Always