In a world that was created empty, I built a few things, then turned my render distance up to 12 chunks.All the blocks in the world started going in and out of my vision rapidly. The higher the render distance, the faster the blocks. When the render distance is turned back down to under 11 chunks, the vision is restored. I attached screenshots taken at random times during the jumble, and one that was normal, taken when my render distance was at 6 chunks.