Since the release of snapshots after 1.8.9, the Chunks are not rendering correctly when you leave a word/server. After restarting Minecraft, it will work again. Some chunks are however generated correctly. There is always one part of a chunk generated and duplicated for all other chunks. This bug happens on all worlds i got on my pc.
This bug also happens if you re-install Minecraft and Java.
The actual bug starts at 00:35 of the video.
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