So I went into creative mode and spawned in some Iron Golems. However when night time came, some of the Iron Golems didn't attack the zombies, in fact they didn't even notice the zombies despite being 3 blocks away from each other. Might affect other versions too.
Linked issues
Comments 2
I belive this is a duplicate or have some connection to issue MC-73724
cant confirm, it worked just fine for me