Mobs with custom Player's Head don't render the Head properly

When you summon a mob with a custom player's head, or a mob pickup the head item, it's just render a Steve head.

(Left Command Block)
summon Skeleton ~ ~1 ~ {Equipment:[{},{},{},{},{id:397,Damage:3,tag:{SkullOwner:Notch}}]}

(Right Command Block)
summon Skeleton ~ ~1 ~ {CanPickUpLoot:true}