FPS drop in game

Hey,
I have a really weird problem with my pc in overwatch.
if i play a solo game via the game browser (on my own)
I my fps is 300 (engine cap) but when i enter a normal game of quick play/comp the fps goes down to 160-200FPS that isnt low but i think there is a really weird bug with my system.

my pc specs:
AMD Ryzen 5 2600 stock
16 GB cosair DDR4 3000 mhz ram
asrock ab350 pro 4
NVIDIA RTX 2060 from gigabyte (3fan model)
and a m.2 ssd

the cpu never goes over 50 degrees
and the gpu never goes over 54 degrees.

-Rick