When I go on Fortnite and press fn and f11 to go to full screen my screen turns black for a few seconds and then it goes full screen but the resolution gets worse and when I press fn and f11 to go back to the Home Screen the screen goes black and the resolution goes back to normal but not on full screen. I have update my bios and drivers, I’ve even factory resetee my pc.  

Specs: Ryzen 5 5600x 
Rtx 3060 12 gb 
16 gb of ram 
1tb of ssd 
Gigabyte b550m ds3h ac 

Any idea what might help?