Bug with Nether Sprouts

Put the summary of the bug you're having here

What I expected to happen was...:
Nether Sprouts should break if you brak block under them

What actually happened was...:
Nether Sprouts are flying, but it's a plant

Steps to Reproduce:
1. I placed warped/crimson Nylium
2. Then I placed Nether Sprouts on it
3. After that I broke Nylium and Nether Sprouts stayed in the air