This bug affects all hostile mobs.

1. universalAnger gamerule set to True
2. Drink the Invisibility Potion
3. change it to Survival mode

[Hit a mob while invisible. As you can see from the outcome, mobs will stay still when attacked by a player unless they get 3.5 close to the player]

This affects all mobs, including Iron Golems, Withers, and Ravagers, so if you drink the Invisibility Potion, you won't have a hard time catching them.