Hi,
the 1.12.2 version 1.0.1 work with all other slabs and stairs normal. Only wood work not and become by right click not the snow texture. Please fix this bug.

That is interesting. I'll check it out. Do note that a new version is in the works but will take sometime as I am rewriting a lot of the code to make it possible to easily add compatibility for other mod's slabs/stairs and a lot of bugs will be fixed with it. I'll respond to this thread when it is fixed

c0a7c0b
Fixed and now published on curse. Thanks for reporting!