The copper golem starts spinning when it climbs scaffolding, which makes it unable to open chests and also prevents it from opening a third chest.
Environment
Singleplayer, Creative Mode
when it climbs onto scaffolding with a stair next to it
MC-301341
The copper golem spins when it is on a scaffolding
Resolved
Duplicate
0
Thanks for the report! This is not exclusive to copper golems, this affects all mobs. Duplicate of MC-150293.