Bottom face of column blocks are rotated 180 degrees

The bug

As you can see on the screenshots, all sideways block textures that face west and south are the only rotated properly. Maybe not a visible issue, but it is really noticeable on purpur pillar, as the lines dont match up with regular purpur with incorrect rotations.

Best reproduced by creating a full cube of purpur with pillars in the very center, to see which directions the bottom of the pillar doesnt match up with.