Scary Nether Chunk Bug

Just look and see the pictures its the chunks changing everytime at a incredible speed, even I can see some mobs there O_O

Important: the bug its aligned with X = 0 ; In the pictures my character is within Positive X and the bug happpens when X turns negative.

Also the last picture Shows same bug aligned with X =200

Edit: When I came out of the portal to the overworld the whole map became fucked as the nether, soooo please tell me even if this bug is duplicated if I should go and trash the map please - __ -