Low fps after the first match

I’m experiencing some weird low fps after the first game what runs at 60-70 fps smoothly, but, after i join another game without reseting the game, i get like, 20-30 fps and low!

My pc specs are ryzen 5 3600 Rx580 4gb 16gb ram and i’m already playing with the lowest settings
I hope this game gets a better optimization son, because the gunplay is freaking awesome!

It’s just make it an even playing field because there’s no cross-play disabled.