Reproduction:
-Spawn/Find a sheep or magma cube.
-Place down a beacon (with 9 required blocks to power it).

Result:
When in the living room, the sheep's, magma cube's and beacon beam textures are gone, instead it shows the back of the living room.
The white wool on the sheep however is still shown white.

NOTE:
When going within the TV, the sheep's, magma cube's and the beacon beam textures look completely fine.