If you run two or more projectile doffs with this launcher and you end up with stacking procs, basically you end up with six seconds of the launcher constantly attempting to fire (and failing, so it plays the firing sound and a torpedo comes out but gets nullified by the game) until the six-second normal reload timer ends and the procs go to waste.
Normal behavior, of course, would be for additional torpedoes to be fired with a one-second cooldown between shots as the stacking procs are used up sequentially (assuming two or more purple doffs, and the 6s cooldown between shots normally for this torp launcher).
Okay, with further testing, it is NOT related at all to doffs. It does this without projectile doffs slotted.
I will concur that this is not an isolated 'glitch'. I have been experiencing this issue as well since receiving it, and tested it with and without PWO's, no change. It's been something I've been living with for a few days, but I was planning on doing some tests tonight to see if these 'seizures' are affecting firing timing/cooldown. Even if not, it's quite annoying...it's like my ship turned into a green bubble party-popper.