When standing on a chunk boarder, looking away from one chunk but still having the chunk in view causes the chunk not to render in view. It appears to be linked to the new rendering properties, where it does not render what is not in view, or in it's cone of vision.
Environment
OS: Windows 8.1 (64x-bit)
Java: Java 1.7.0_60 64bit
RAM: 4GB
GPU: GeForce GTX 770
Dupe of MC-63020