TCM fps drop or I don't know

I have a strange problem with the game. I launch it and the benchmark is running fine no drops, but when I'm log in the game after 5 or sometimes 10 min of gaming the fps is starting to drop mostly when I'm driving fast. Sometimes it's happen 1-2 times in a row sometimes doing it more times. The fps counter show max 5 fps drop from a solid 60 but it feels like much more. I tried every preset grafic setting but it's happening every time.

I have literally the recommended PC for 1080p:

ryzen 5600

6650 xt

16 GB ddr4 ram

sata samsung ssd

win 11

temperatures are fine and also the cpu and gpu usage.

Thank you for the help.