Online Matches Lagging Issue After Some Time on PC

I'm playing the game on pc. In a match with AI, gameplay is really smooth. But with rivals, rush etc. After some time, ~30 seconds or after a couple cutscenes, the game starts to lag. At the start, it runs smooth like it's a squad battle and my ping is not high. But after some time when I press a button it feels like it's actioning a second later. As the game proceeds, this feels like it's stacking and getting worse. At this state, online matches are unplayable, please provide a fix.