Semi-Pistol Cannonade doesn't work with Tombfinger

[Malchior0420]

As the title says. Semi-Pistol Cannonade can be equipped onto Tombfinger but does not affect the fire rate. It doesn't lock the rate nor does it increase damage in the UI. Further, when exiting the mod screen and reentering said mod screen, the mod is unequipped on the gun and does not function when on the weapon in any capacity. I would imagine it should work, right? From my testing, it is the only gun I have found that behaves this way.