Seems like there's two, different considerations here:
1.) If, for example, the Headhunter skill that should eliminate weapon sway while crouched is not working, send it in to CDPR Support. I know that several players have claimed that weapon sway is not being eliminated when it should be.
2.) There are Settings options for how weapon sway works.
- On Camera - means that the crosshair will remain locked in the center of the screen, and the whole image will start shifting around with the sights or scope, similar to the older Call of Duty games.
- On Weapon - means that the camera will remain fixed, but the actual sights/reticle will shift around on the screen, similar to how something like ArmA works.
Try both, if you haven't. Generally, people find one to be much easier to deal with than the other.