a torch is flying under a red mushroom

What I expected to happen was: put the torch in the block in top of the mushroom next to the column of central block for an error*

when i've tryed, the torch start levitate at mid-air

Steps to Reproduce:
1. choose a red mooshroom in a mushroom biome
2. put the torch in top inside the mushroom
3. and it's going to putted in the air