Anyone else notice the screen jitters while moving, mostly strafing? It isn't smooth, yet FPS shows high. Any ideas?

I've tried changing graphic settings, restarting the game, the problem persists. I'm unable to play as it gives me eye strain and a headache.

If no solution, I guess I'll need to refund :(

Update: After some research, it seems this is something that can happen with Unity games. I'm not sure if there is a fix the devs can implement. Either way it's causing me eye strain, so I'm unable to play comfortably.