This issue is also visible in The Corners mod (like the tunnels in Hoary Crossroads), but I was generating a maze dimension and noticed that nearly all of the corner stair blocks (excluding ones in the negative-negative quadrant) have incorrect rotations. Seems to be related to the mirroring of nbts, since any nbts with manipulations without mirror don't seem to have these issues.
This issue is also visible in The Corners mod (like the tunnels in Hoary Crossroads), but I was generating a maze dimension and noticed that nearly all of the corner stair blocks (excluding ones in the negative-negative quadrant) have incorrect rotations. Seems to be related to the mirroring of nbts, since any nbts with manipulations without mirror don't seem to have these issues.