[MC-80210] Bocks disappear when out of focus

As seen in the screenshots, the blocks at the edge of the screen disappear when out of focus; creating a cut in the view.

Environment

Win 7-64 bit
Java (64-bit) 8 Update 45
MCPatcher

Does this still happen with the vanilla textures?

@John_Dame Yes, It's not about textures, it's a bug in the game

The point I am trying to make is this is reporting a "modified" version of minecraft when you are not using a Vanilla everything. Textures included.

IMO anyways..