Graphic settings keep resetting during gameplay

Hello! I have this strange issue that my graphic settings are going back to high even if I`ve set them to Custom. I have tried all fixes found around internet so far but no luck. It`s super annoying bc also the FPS drops because of this. 

PC Specs: AMD Radeon RX 5600 XT, AMD Ryzen 5 3600, 16 GB RAM

Any help would be much appreciated! Thanks