If my drivers seat is all the way back and I move the slide control forward to move the seat up it moves up about half the way then stops. It then doesn't respond for a few seconds. Then to get the seat to move the rest of the way forward I actually have to slide the control backwards. To move the seat back I have to slide the control forwards and it goes about half way back, stops again for a few seconds and normal operation resumes from there back. Has anyone had this happen or know what would cause this?