When i have hdrp-motion blur activated, it leads to a glitch-like flittering back and forth on models. The movement is the camera rotating around an object. Its the CinemachineFreeLook component. The flicker does not only appear on the model that is the target of focus but also round them. It seem to be related to the rotation. Unity 2019.3.4f1 HDRP Version 7.18 & 7.3.1 tested. Glitsch exists on both an imported model and the HDRP example hammer.