Amethyst crystals cannot be placed on the side faces of replaceable blocks

The Bug:

Amethyst crystals cannot be placed on the side faces of replaceable blocks.

Steps to Reproduce:

1. Place down any replaceable block, for example, a fern.

2. Obtain any amethyst crystal and attempt to place it on the top face of the fern's hitbox.

3. Take note of how the fern is correctly replaced by the amethyst crystal.

4. Place down another fern elsewhere.

5. Attempt to place an amethyst crystal on any side other than the top face of the fern's hitbox.

6. Take note as to whether or not amethyst crystals can be placed on the side faces of replaceable blocks.

Observed Behavior:

Amethyst crystals cannot be placed on the side faces of replaceable blocks.

Expected Behavior:

Amethyst crystals would be able to be placed on the side faces of replaceable blocks.