When I place stairs upside down or place it as a corner stair, the texture of the stairs aren't how they should be.

When I place stairs the texture of the stairs aren't how they should be.

A normal looking stair.

What actually happened was that, the texture's of the stairs where all weird looking.

Steps to Reproduce:
1.Get a stair of any kind.
2.Place it any way you like.
3.And the texture's aren't how they should be.

*Note: when you place a stair with the high part to the east the textures of the stairs look normal. (I tested it with all the stairs including the new Red Sandstone Stair).