Budgie's menu leaves flashing residue on screen.

So, running Manjaro non-free.
Tried the budgie live ISO (stable) tonight... And quickly realized "No". Why? Because every time I opened the menu the last... 2 millimeters or so stayed on screen, blinking, after I closed it.

It does not behave like this in any other DE with Manjaro I have tried, and I have tried all of them (not lying, if we consider "started the live ISO" trying).