Affects Version/s: Minecraft 1.8
Fix Version/s: None
What I expected to happen was...:
The grass would disappear and the block I placed would still be there.
What actually happened was...:
The grass disappeared, but a very short moment later, a peony flower popped up where the grass was and then it disappeared again.
Steps to Reproduce:
1. place tall grass block
2. place a block on the bottom half of the tall grass