Might be a related issue, something new this weekend I've never had happen before in this game.
I was in my D-9, and had a lag spike develop after I had pulled the trigger at the beggining of a 3-5 second hosing. When I depressed/released the trigger, a period of lag/freeze developed lasting maybe 1-2 seconds before my machine caught up.
When my machine had caught up, I was still firing and continued doing so for another 2-3 seconds (for those keeping the math, this was at least a good solid 4-6 second lag hickup) while still encountering "residual" framerate lag (I had stick control of my plane, but it was still firing... twords the end of this hickup, and suprised, I physicaly glanced down at my stick to ensure it was physicaly fine, and it was). My computer further caught up, frame rates restored, AND THEN the firing stopped (visualy w/ tracers and the counter ticking down, and the audio as well were all going off from when/what I could see).
I have not encountered or been able to reproduce this type of lag since, but it was this weekend in the MAs and could be related to the recent patch. I have never experienced that type of lag before.