Rendering on multiple objects
There's a rendering bug that is affecting stairs and redstone wiring and possibly more.
It appears to be cardinal direction dependent, it seems as though the rendering isn't reading the UV mapping correctly.
Image's are attached to this post including F3 data for the purpose of checking orientations.
If I come across any more objects displaying this bug I'll add images of them to this ticket also.
MC-66970 Major texture disortion for Redstone, Stairs, Cobblestone Walls, Fences and Fence Gates