What I expected to happen was...:
Gravel, as part of a trap, was placed on a rose/yellow flower. I thought that when the flower popped up (as a result of light level 0) the gravel it was supporting would fall.

What actually happened was...:
Instead after the flower popped up and the gravel stayed floating in mid air until an adjacent block was updated. This doesn't happen when the flower is destroyed by hand or by water or any other non-interactive ways.

Steps to Reproduce:
1.Place a rose/flower on ground.
2.Place gravel above it.
3. surround flower with blocks so light level becomes zero.
4.flower will uproot, but the gravel it held will still float.