A Hole Is Cut Out *NOTE-This is a 1.8 bug, but it refuses to let me select 1.8

I built on my world, and I came back, it was perfectly fine, then the NEXT day, it had tons of perfect rectangles cut into it...

What I expected to happen was...:
It was a viewing bug, and it would go away after a few seconds.

What actually happened was...:
Instead, It stayed, not changing at all.

Steps to Reproduce:
1. Create a new world
2.Build (include villagers in fences and banners on fences)
3.Close world and minecraft
4.Open World
5.Close Minecraft
6.Open World. you have reproduced the bug.