Shulkers with NoAI are White

The Bug
When a Shulker is spawned with NoAI there shell texture appears white.

Commands Used
/summon shulker ~ ~1 ~ {NoAI:1,Silent:1,Invulnerable:1}
/summon (Mob) ~ ~1 ~ {NoAI:1,Silent:1}
/summon (Mob) ~ ~1 ~ {NoAI:1}