That's mentioned in TFA. It doesn't fix the issue, and might have actually introduced it according to OP.

Also, he's using an AMD graphics card. AMD GPUs are infamous for stuttering issues and framerate problems on Windows.

I tried a RX580 pre-pandemic and it was both a space heater with massive power consumption, framerates were wildly inconsistent in several games, and I had game crashes.

Switched to a GTX1060 and boom, problems gone.