Blocks not showing above layer 64 on superflat mode

In my superflat testing world (on Redstone Ready preset) whenever I stack any block above layer 64 on a chunk boundary in the negative x direction, blocks are assumed to be showing, but are not. The collision occuller does not factor in the missing block, and does not show the face of the lock behind it, so I am assuming that the game thinks the block is rendering, but it doesn't.