Viscous punch doesn't work on middle lane columns

[mashin.buu]

Viscous puddle punches have no hitbox if used on the middle lane columns that face inwards. It works correctly below the bridge and on the arched part, and on the other faces of the column, just not on the part displayed in the attached picture.

Additionally, if you walk right up to that face, you can cast the puddle punch through the wall.

 

[mashin.buu]

The hitbox does work if you're off of the bridge, but if you're on the bridge it does not hit.