Iron Golems don’t attack player when harming/killing villager

Was it on peaceful mode? Also the walking animation bug is being tracked in a different ticket.

No, it was on hard difficulty 

Was this iron golem spawned by the village, or did you create it?

Spawned in the village

it’s partially fixed though

Updated confirmation status to "community consensus" based on duplicate reports.

I also experienced this issue myself in 1.16.20, but I have not tested the conditions thoroughly. Here are 5 hypotheses:

1. Iron golems spawned by a village in an earlier version do not respond to players hitting villagers in a later version.

2. Iron golems must be within a certain range of the villager that is hit/killed, in order to become hostile.

3. Villagers' complex AI interferes with their ability to "call for help" to the golems before they are killed, or before they choose another behavior.

4. Iron golems suffer from MCPE-50207 and can drop player targets almost instantly if they are too far away from the player.

5. Iron golems only become hostile if a villager is hit and the player's popularity is below a certain amount (e.g. below 0).

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Steps to Reproduce:
1. Find a village with an Iron Golem
2. Hit a villager

Expected Results:
The Iron Golem becomes aggressive to me.

Observed Results:
The Iron Golem does nothing.

I am having the same issue. My world was created in 1.20.71 and the only non-default vanilla thing I have on the world is the gravestone addon from the marketplace. And this has been happening for vanilla worlds too. It's been a thing that I've noticed for a long time, I never knew I could even say anything about it until recently.

Confirmed in 1.21.44

Is this really a bug? Iron golem attacks player when the value of popularity is below -15. One hit makes it -1.