What I expected to happen was...
When gravel falls, it should look like gravel when it is in the air....

What actually happened was...:
When it fell, it was either white or green/grey blocks, they went back to gravel when they hit the ground....

Steps to Reproduce:
1. Generate A World...
2. Find Floating Gravel...
3. Break 1 Piece, all of it should fall....
4. When it falls, most of the time it will be white or green/grey....