1. Open Virtual Arsenal or Editor.
2. Equip a rifle fitted with a bipod.
3. Go to the prone position.
4. Attempt to deploy the weapon and experience weapon twitch.
5. Go to the Weapons controls menu then exit.
6. Successfully deploy the weapon in the prone position.
7. Move out of prone, re-enter prone and issue reappears.
(Xbox 360 wired controller in use, custom settings in menu)