This has been happening for a while now. I think it has something to do with the auto fire triggering as we spam the space bar to fire torpedos (am probably wrong though, although I am sure I read that on the forums somewhere).
I sometimes see my Tricobolt in PvE come out of my Launcher, get half way to the target and than just stop. It wasn't a graphical glitch of it just 'staying' there are being shot because 10 seconds later after I noticed it stopped moving, an enemy ship targeted it with beams and destroyed it. It is frustrating to get that 60 sec cool down after a 'dud' tricobalt fires.