Experimental KVM 59 - chain lightning stopped working

Platform: PC

After testing the experimental ammunition types with the Experimental KVM 59 i noticed that it would not give any chain lightning procs anymore with the normal ammunition types despite testing on multiple groups of machines.

Steps to reproduce:
Probably fire the Experimental KVM 59 with the newly available experimental ammo types (my guess is that shock ammo might be the culprit). Then switch to normal ammo types and test if chain lightning effect procs occur? Ever since it happened it has been persistent even when loading the game after restarting the PC.

Host or Client: Singleplayer, did not test in multiplayer games.

Windows 10 - 64 bit
Intel core i7 - 7700HQ
NVISIA GeForce GTX 1060