Place a copper chest, and a wooden chest fill with a item A, a wooden chest with a item B, a wooden chest with a item C and a wooden chest with a tem D.
Place a copper golem above the chest.
Put item a stack of D in copper chest.
Result: Copper gloem cannot put item D in the fourth wooden box. It can only check the first wooden chest. For the rest of the chest, it just shakes his head and check the chests very quicky, but it cannot put things in them.
Similarly, place a copper golem under the chest. It can’t sorte items properly. It only works when copper golem and the chest are at the same height.
can confrim