Firefly bushes cannot be replaced when attempting to place blocks in the same space as them

The Bug:

Firefly bushes cannot be replaced when attempting to place blocks in the same space as them.

Steps to Reproduce:

1. Place down a firefly bush.
2. Attempt to replace the firefly bush with a solid block.

Observed Behavior:

Firefly bushes cannot be replaced.

Expected Behavior:

Firefly bushes would be able to be replaced.