Regular controls.
It’s quite difficult to tell, the problem seems to be intermittent. I’ll repeatedly press the button and every one in ten or so, the button goes on and stays on. At that point the action reverses, a press briefly flashes the button on. Couple more presses and it reverts back to correct. It’s impossible to tell if holding the button down makes it any better because I never know if it’s going to misbehave.