Input from keyboard and mouse causes extreme input lag.

Opened Apex and noticed when I am looking around with my mouse and strafing with my keyboard for example, the entire game begins stuttering and an extreme amount of input lag starts happening. Also it doesn't matter whether I'm in game or not. I could be moving my mouse over menu items and when that happens, the menu items get highlighted, however, the moment I press down any key, moving my mouse over menu items becomes extremely delayed.

I've tried lowering polling rate on the mouse (can't seem to lower polling rate on Zenblade65). I've tried rolling back drivers, using different USB ports, cables, and even a different keyboard (a regular mechanical keyboard) and nothing has resolved the issue.

Anyone else experience this?