[MC-45864] Zombie cannot break Door

Zombie come to the Door and wait here. He not try break down the door. Is like it once the 1.7.4....

Linked issues

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report (minecraft/crash-reports/crash-<DATE>-client.txt) here.

Is your world difficulty set to hard?

Are you SURE you are in hard difficulty?
Have you /gamerule mobGriefing false ?

Please answer me. I am in Hard, i am sure, i dont have the Gamerule. Is strange, because zombie supposed destroy door in Hard....