What I expected to happen was...:
Entering a mobs view in Spectator mode, leaving a world, and joining a new world, would give me my regular view back.
What actually happened was...:
I created a world to test out Spectator Mode, I entered a creeper's view, left the world and joined a new world. The Creeper's view[Shader], was still there. Yet, I could move around in Survival and creative. I also tested this out with Enderman and Spiders. The result being the same, the mob's respective Spectator View[Shader], was still there.
Notes
Pressing F5 in game fixes the problem
Steps to Reproduce:
1. Create a world
2. Spawn a Creeper, Enderman, or Spider
3. Enter Spectator mode
4. Enter their view
5. leave the world
6. Create a new world/ or join another different world
Linked issues
is duplicated by
relates to
Attachments
Comments
Confirmed in 14w06b.

Confirmed for 14w34b.
Sorry if someone already fixed this for the next snapshot, im just reporting what happened to me. >.<