Summon Code Not Seeing UUID And Properties

The command below works fine. Gives a proper skull.

/give @p skull 1 3 {display:

{Name:"Medicine Chest"}

,SkullOwner:{Id:"f32f4e87-9fb0-48b0-8cc4-56eebf3c6f82",Properties:{textures:[

{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZjdjN2RmNTJiNWU1MGJhZGI2MWZlZDcyMTJkOTc5ZTYzZmU5NGYxYmRlMDJiMjk2OGM2YjE1NmE3NzAxMjZjIn19fQ=="}

]}}}

Trying to do the same thing on NPC code does not work.

/summon Villager ~ ~1 ~ {Profession:0,CustomName:"TestingNPC",CustomNameVisible:1,Career:3,CareerLevel:42,CanPickUpLoot:0,PersistenceRequired:1,Invulnerable:1,Offers:{Recipes:[{buy:

{id:"cobblestone",Count:1}

,maxUses:9999999,sell:
{id:"skull",Count:1,Damage:3,tag:{display:{Name:"Medicine Chest"}},SkullOwner:{Id:"f32f4e87-9fb0-48b0-8cc4-56eebf3c6f82",Properties:{textures:[

{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZjdjN2RmNTJiNWU1MGJhZGI2MWZlZDcyMTJkOTc5ZTYzZmU5NGYxYmRlMDJiMjk2OGM2YjE1NmE3NzAxMjZjIn19fQ=="}

]}}}
,rewardExp:false}]}}

Now, I know Mojang is proud of all their "features" of the game, and this is probably "working as intended" which a lot of things in Mojang code are... which is the same reason nearly 100% of the servers out there run Spigot and NOT Mojang software...

But is there any way this can actually be marked as non-working for once and get a proper fix? Yea, that'd be great. Thanks!