Today I saw it after changing skin to the default Material Design one. What happens is that after first run after update (or after changing skin) whenever I hover over any of the menu items (e.g. File/Edit/View etc) the menu dropdown area is blank and fills the whole screen vertically like this:

Usually quitting and restarting makes it go away and everything is OK again but today I also got this error:

Again, when I quit and restart it's all OK again but I can often replicate by switching skin to Material and restarting.



