When you destroy a sand block, all the ones that are above are instantly destroyed, and you do not receive the sand from the blocks above.

*What I expected to happen was that the other blocks would fall down.

*What actually happened was that the blocks above were instantly dstroyed and did not make a drop.

Steps to Reproduce:
1. Find sand.
2. Destroy the block at the bottom.
3. The blocks above dissapear.