Super Low FPS on full-screened games after League of Legends has been opened

[Patkosi]

Hi guys, For a few weeks now, every full screened game tends to run in a horrible state (13 fps solid, if not less), If League of Legends was opened on the PC before.

The only solution was to restart the PC, but that gets really boring after every match. It's almost as if the game thinks it's alt tabbed and not prioritised over something else.

My rig: AMD RX 580 8GB - Just installed latest drivers, issue still persists, base clock

Intel Core I5 7500 3.4 on base clock

16 GB DDR4 Memory, on 2400mhz

650W PSU

Windows 10 64bit version

Let me know if there are any other details you'd want me to provide, that could further aid the troubleshooting process.

 

Edit: The games affected by the issue are Escape From Tarkov, and Dead By Daylight, both of which have no borderless fullscreen, so I can't use that as a solution.