Eyetracking is implement to always look at the camera, it is not relative to the head or chest. You can test this by looking at the center of the SUVA window and rotating the camera left and right, you will see that the avatar keeps looking at you until it hits its range limit. In SUVA 2.0 this entire system gets updated and you will be able to choose what is being looked at. SUVA 1.X will not receive any feature updates but only bug fixes when needed. This is not a bug though, this was by design.