FPS drop on second game and next

Hello,

For unknown reason only during first match I have normal FPS (over 130). Second match and all next, until game reset, I have 60 FPS or less. It started now. Last time I played before, around 3 weeks ago, it didn't happen.

I'm using laptop:
ASUS G614JV-AS73
i7-13650HX
RTX 4060
16GB RAM