Warden's Spectator vision should be blind.

Hello, Mojang people! As you know, when you enter the Spectator mode and click a mob, you can see its vision. Some mobs even have custom ones, and I think one of them should be the Warden. I really don't know if this is a bug or not, but in my opinion the Warden spectator vision should be completly black, to reflect its blindness.