I've got the same problem too, my graphic card is Nvidia.
I "workaround" it by using OS custom shortcut key to toggle the Chobby display size, make it max windows size but DON'T get into fullscreen.
In Gnome you can custom "toggle fullscreen" shortcut keys first and use this shortcut key to do this, in other Desktop Environment I don't know but might have similar function to do this.
After this, my lobby not flickering again.