Steps to reproduce the issue
Create an enclosed space with 10 chests, a copper chest, and a copper golem. Place some chests outside the enclosed chamber.
Expected result
The copper golem would ignore the chests it can’t reach and focus on the 10 chests it can reach.
Actual result
The copper golem gets distracted by the chests it can’t reach, completely breaking its sorting cycle.
From my testing, you don’t even need to put chests outside the enclosed area. Just put them on top of the first set of chests.