Breaking the block under a Copper Golem while it is searching a chest causes it to float

Steps to reproduce the issue - Break the block underneath a Copper Golem while it is searching a chest.

Expected result - The Copper Golem will fall into the hole.

Actual result - The Copper Golem will float there until it has finished searching. This also seems to cause the chest to remain open, even though the golem is no longer searching it.