If a Brewing Stand is placed on top of an Anvil and the anvil is used until it breaks, the brewing stand floats.

Put the summary of the bug you're having here

What I expected to happen was...:
The Brewing Stand to break

What actually happened was...:
The Brewing Stand floated

Steps to Reproduce:
1. Place an anvil, and place a brewing stand on top.
2. Use the anvil until it breaks.
3. ...