I've been sitting in S60 farming for crew XP/mastery points. I just used a crew mastery respec consumable, and immediately after using it I stopped doing damage to any enemies. My shields are barely scratched by enemies in this sector so now I'm just sitting there doing nothing to a growing hoard of enemies that's slowly eating at my FPS (usually at ~90 fps, currently at 27 with this issue).
Restarting the game didn't fix anything.
I've checked all my other damage-related settings and everything is as it always has been. I don't want to have to prestige if I don't have to...