Could be a door switch which is just being closed. It may be loose or you may be able to adjust it so it pushes the actuator further in.
The door gets hit with some clothes, the switch opens, dryer stops, clothes fall, no longer push against the door, switch closes. Lo and behold you come along push start and away it goes
I know on my dryer, with the door open the dryer stops but the timer continues to run until it hits the OFF position |