Zombies, Zombie Pigmen, Ghasts, Guardians, Slimes, Magma Cubes, Wither Skeletons, Spiders, Cave Spiders, Silverfishes and Endermites do not attack when hit by other mobs

i confirm this because when a skeleton hits a spider with an arow it wont attack the spider this works with zombies too and snow golems when they attack the spider they do not react

Um...... how did you find out that it affects ghasts? How did you get a mob to hit a ghast? Can not check because I only have pocket edition and a slow laptop with demo. Typed from iPad.

oh the ghast ok the zombie doesnt attack the snow golem for example if the skeleton attacks the spider it wont attack back

confirmed for 15w44b with skeleton and zombie

If this is about the fact that they do not attack the mob they were hit by, then this is very likely a duplicate of (or at least strongly relates to) MC-729

Note: Guardians and Ghasts work as intended

Haven't tested in latest snapshot, however in 1.8.8 Blazes attacking and hitting zombie Pigmen agro the Pigmen to player. Would like confirmation if intended or fixed?