Blocks diapering in side view when looking in certain angles.

What I expected to happen was...:
The blocks shouldn't disappear.

What actually happened was...:

The blocks disappeared from view and I could see mobs through them.

Steps to Reproduce:

1. You can stand anywhere but standing against a glass pain guarantees it happening.
2. Look around in game somewhat facing the pain (turn left or right)
3. On the edge of screen the blocks disappear from view and you can only see the sky and mobs.

4. not sure but I know in works underground in a small room about a 6x6