The iron golem's AI is inconsistent. In the video below, you can see that, despite the wall, the husk can see the golem, but the golem seems unaware of the husk. Even after the husk attacks the golem, the golem does not retaliate for several seconds. On the second attempt, you can see that the golem's response is much quicker, but he still did not detect the second husk with the wall in between. I have even run some tests in which the golem and husk both ignored each other.

I have been trying to make an iron farm recently, and this inconsistency in the AI has basically rendered it useless.

Download video here: golem AI bug.mp4