In addition to the odd pixelated reflections on metal/reflective parts in and outside the car, the shadows are also partially broken in RT (Xbox).
Please observe the moving shadow around the left column of the windscreen. The moving shadow initially shows up flickering and then smoothens out. This was not the case pre Update 14 I believe.
Changing to Performance 4k fixes it so it’s obviously another issue relates to raytracing following Update 14.