Call of Duty has been around for many many years now and one of my biggest complaints has always been how poorly the Smoke Grenades work. Smoke Grenades have always had the issue of not being in the same place and/or not displaying properly from person to person.
Example: Enemy shoots you through smoke that appears on your screen. During the kill cam that enemy will not have their visability blocked by smoke, instead the smoke is in a different spot or not displaying correctly on their screen and shows you as being out in the open.
Why is this still an issue for Call of Duty after 15+ years?