I've recently noticed a slight bug with the un-augmented Impulse Cannon, that being the beam disappearing after about half a second of firing. Its sound and damage persist, I just lose the incredibly satisfying visual effect. Love the mod, one of my absolute favorites, so I hope you can help get this fixed!

That's unusual. Does the beam fade out and go away, or does it abruptly disappear? Do you have Optifine or anything invasive like that installed?