What I expected to happen was that the texture for the quarts stairs would be the Smooth Quartz texture consistently.

What actually happened was when I placed a third block, the texture on that block was that off the pillard sandstone. Next block I placed, it was chiselled. It continues like this randomly.

Steps to Reproduce:
1. Get come quartz stairs
2. Place one.
3. Place some more, eventually you will see that they change texture.
4. Break one of the stairs.
5. Replace the stair a couple of times.
6. You will notice that the texture is the same.