Iron Golems are indifferent towards hostile mobs

Hello. At the beginning I would like to apologize for my English but I translate it with google translate.

Today with updated my version of Minecraft on the xbox one console to version 1.11.01. And I was thrown off that the Golems who are supposed to defend the village from mobs do not attack them at all. Is this what it was supposed to be or just some error? Has anyone noticed this yet?