It sounds stupid but in my rubi it had a push button to engage and you never fully knew if it was engaged or not. I would of definitely preferred it hooked up to a rocker switch instead. That way theres no guessing if its engaged or not, you know its either off or on.
I'm not clear on this but I've heard about engagement after some movement an disengagement and re-engagement when shifting to reverse, I've heard this about the Eaton, but not sure if it's a general thing