I was testing one of my SVs to see if it would work on a plasma planet, and in addition to realising that I need more thrust, I also noticed that the upgraded version of the fixed laser cannons don't work quite right. I would occasionally get a few rounds off were they appeared to be working correctly, but then it was as if the shots just ended a few feet from the barrel, or fired off in random directions.

I tested range from target (I know the railguns don't like to shoot if too close) and mounted position on the SV all with the same results. I then tested the base laser cannons as well as the modulated ones and each of those all hit where the cross-hairs were pointing. I then went back to the adv. lasers, and immediately went back to hitting in wildly random spots if it hit at all (still used all the ammo though).

granted, plasma planets aren't ideal for screenshots, but you can see the small red dot where the laser blast hit compared to where I was aiming (up and to the left)
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3137270448