Wildflowers cannot be replaced when attempting to place blocks in the same space as it

The Bug:

Wildflowers cannot be replaced when attempting to place blocks in the same space as it.

Steps to Reproduce:

1. Place down some wildflowers.
2. Attempt to replace the wildflowers with a solid block.

Observed Behavior:

Wildflowers cannot be replaced.

Expected Behavior:

Wildflowers would be able to be replaced.