Neutral mob do not escape or attack back

I've create a world in survival with command activated, and i change the universalAnger gamerule to true, while forgiveDeadPlayer was in true , and also change fallDamage to++ false

I was expecting a game like another, but with this 3 gamerule change.

But when i have spawn, i attack pig and cow and they didn't escape.

As well the iron golem didn't fight back when i attack him.

The mobs didn't do anything that they usually do in the former version, theu just stand in place.

Steps :

1. Create a world in survival, with universalAnger and forgiveDeadPlayer set to true

2. Find a pig, a cow, an iron golem or i think any neutral mobs and attack him