Pale hanging moss cannot be replaced when attempting to place blocks in the same space as it

The Bug:

Pale hanging moss cannot be replaced when attempting to place blocks in the same space as it.

Steps to Reproduce:

1. Place down some pale hanging moss.
2. Attempt to replace the pale hanging moss with a solid block.

Observed Behavior:

Pale hanging moss cannot be replaced.

Expected Behavior:

Pale hanging moss would be able to be replaced.