I've had this issues for years. i dunno if it is my cfg or what it is:
here's a screenshot:
it happens when i pull console down or up, when i pull down, it seems some hud elelments go down as well, out of the screen.
see that black bar at the bottom in screenshot 11? that sometimes stays when i pull the console back up. so it appears when im playing normally also.
my cfg is here:
Can you help?
it happens in all ezquake versions.