fps drops during the game

in Game Support
Hello,
I have a gaming laptop with specs:
i5 10300H
RAM: 16GB
GPU: GTX 1660Ti
So, when the game starts, it runs smoothly. But in a heavy scenes like skirmish where there are lots of online players around me, fps starts dropping 60 fps to 45 or even to 35 fps. I tried to switch graphics to low settings, but nothing changes significantly. When skirmish ends game continues to run smoothly again even on epic graphic settings.
Is there any solution for this issue?
Thank you in advance.
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