Custom player skulls show as the default skin's head on mobs or players

When I summon a zombie wearing player skull with SkullOwner tag, this zombie spawns with Steve's head. Even when I summon a zombie with CanPickUpLoot tag seted to true and I throw that skull on him, he pick the skull up, but it's always Steve's had.
Hope you understood my bad english, I'm from Czech Republic

Commands:

/summon Zombie ~ ~ ~ {Equipment:[{},{},{},{},{id:skull,Damage:3,tag:{SkullOwner:Dadae_Lump}}]}

/summon Zombie ~ ~ ~ {CanPickUpLoot:true}

/give @p skull 1 3 {SkullOwner:Dadae_Lump}