That is not self Explanatory.
Please explain situation, expected behavior, and resulting behavior.
Most literal interpretation is that the buoy, having a slow projectile, arcs enough that a thug between the commander and the buoy finds the shot flying over it's head.
Or, maybe the thug is next to the commander, and the commander is too tall for the shield, so the project hits the commander. In that case, this is expected because the commander is not protected by the tiny shield.
Or maybe it is piercing the shield, ignoring it because of damage and slow 1/3rd damage bonus, although that wouldn't seem like it would create the thread title.