Keyboard keys stuck and repeating

[Le Baron de la Fesse]

Hi,
I have this weird problem (since forever) that randomly keeps my keys pressed until i press them again. Often it is the case wit ASWD but sometimes also tab and shift.
Very annoying bug as it is guaranted to damage me most run, sometimes killing me (especially when i dont figure out the direction to press again immediatly and i take another free point of damage).
I think it happens more when i my computer has less CPU/memory available.

I'm playing on latest OSX (MBP late-2013) and with the latest version.

Thanks