I can confirm that there is also the ghosting issue when using DLSS. I used Benchmark Mode and Spa. The ghosting is of the whole car, and is particularly obvious in Cockpit Camera, TV Pod (ghosting of both front tyres, as if the tyres are reflective surfaces) and the chasing camera (player's car and the car in front).
My spec is RTX 2080Ti with Game Ready Driver 452.06.
Screenshot is not showing the problem particularly well so I'll try to upload a video later.