[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....

Environment

PC Window 7, last java version, Hard, Survival

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....