Slime block and piston fails textures.

I was expecting it to stay normal textures,
A block moving with the slime block

The side of the block flipped
All of the sandstone blocks' sides have been flipped (the real side stayed the same) (just found this out it turns slabs with different side and top textures to full one's and flipped!)

Steps to Reproduce:
1. Place any piston on sandstone
2. Put a slime block on the face of your piston
3. Put a sandstone/slab block in front of the slime block
4. Activate the piston

5.Should derp the texture for a split second!