Deploying a weapon with or without bipod always pushes the player into unwanted directions even if you're on a stable platform.
When in crouch or standing position weapon resting pushes you to the left.
When in prone position weapon resting pushes you backwards and right.
Demonstrated in the video using a stable platform.
This can be very annoying if you're trying to hold a position and if you open your map the weapon automatically undeploys.. Which means you have to crawl back to your position and redeploy.