Spawn egg bug

When I try to make a librarian spawn egg, something went weird. I spawned farmers, clerics and other villagers with white cloth，unlike

/summon villager ~ ~ ~ {Profession:1}

Steps to reproduce
1. Make a librarian spawn egg.

/give @p spawn_egg 1 0 {EntityTag:{id:"villager",Profession:1}}

2. Spawn some villagers use the spawn egg in step 1.
3. Trade with them.(not all villagers)