I don't know java version
Put the summary of the bug you're having here
What I expected to happen was...:
Scaffolding fall down
What actually happened was...:
Scaffolding levitate (My English is bad)
Steps to Reproduce:
1. Put the scaffolding on top of each other, to any height.
2. Start building them sideways until they start to fall.
3. Click very quickly, build scaffolding, and the levitating will appear in front of you.
4. Jump on it, and by right-clicking you will be able to control it.