Quoted from Vector:Don't forget to check the switch at the button itself. I've seen it stick (or be misadjusted) many times.
That's what I was thinking. RBION uses a double stacked switch, so I would lift the PF and hit the buttonand visually see what's happening. If it gets stuck on, seperate the switch and see if that stops it...then you pretty much know you need some adjustment there.