Stairs do not connect properly

Buffet world, snowy tundra, seed: 5778648556056485964
Coordinates: 180 69 -293
Facing: East
It appears that some stairs load incorrectly and do not connect properly (see image). This may be hardware problem, but after recreating and reloading the world, I believe this is an issue with the coding. It is not a game-breaking problem, but is annoying. I did not teleport to the location; I flew there.
Other stairs, however, do load correctly and connect as they should. (See second image)
Edit: Another found in the same world. Facing: South; Coordinates: 150 67 -267