the iron is just disappearing when it hits the conveyors, there are some tricks I can do to prevent that for individual irons but that doesn't look intended
On the first level, the iron falls on the conveyor, slides to the right a little, then blinks the same way it does when it hits the ground and disappears. there's a trick where i can let it fall on a conveyor before and then erase the conveyor to save one(1) iron. wether the iron disappears does not seem to depend on height.