When dropping falling blocks onto upper facing slabs, instead of them landing and placing down they will break as if it was a lower facing slab.

What I expected to happen was...:

After dropping a falling block (concrete powder, sand, gravel, etc) it should land without breaking.

What actually happened was...:

The block broke upon impact of the slab and ended up as a item entity.

Steps to Reproduce:

1. Place a upper facing slab (Slab placed on the upper side of a block)
2. Leave a space above the slab and place a falling block
3. Allow the block to fall onto the slab, this should break the block instead of allowing the block to properly land upon it

Screenshots:

Gravel:

Sand:

Anvil:

Concrete powder:

Unfortunately I am unable to provide video evidence of this bug as my current device is incapable of recording.