In other 1.9 snapshot versions like 15w50a the elytra would become invisible along with the player but in 15w51b it does not
Does NOT become invisible along with the player
In other 1.9 snapshot versions like 15w50a the elytra would become invisible along with the player but in 15w51b it does not
Does NOT become invisible along with the player
Works as intended.
The Elytra is not supposed to go invisible along with the player, just like other pieces of armour. This is bug MC-90095.