Summary:
The hitbox of walls that made a pillar is too large, when it is connected to the side.

Steps to reproduce:

1. Place 2 walls next to each other.
2. Place a torch or lantern on top of one of the walls to form a piller.
3. Look at the wall to see the hitbox.

Observed results:
The hitbox is above the wall to the sides of the pillar.

Expected results:
The hitbox will only be around the pillar and the visible top of the wall.

Screenshots: