Lag on a 5 minute battle

CG_Meathead​ I know no one probably cares much as this has been going on for a while now, but i just played a TW match against a squad led Maz Kanata. My computer spent 3.5 minutes frozen in the match, the last 2 freezes i actually bothered to note the timings, and they were over a minute each.

This is unplayable, and it's inside the official app for the game on pc. I'm running no other programs. What can we do to stop this happening?