The bike in between the pedestrian and vehicle likely confounded the lidar: too complex a 3D surface, little return from radar. Is it a solid object or a swarm

The bike in between the pedestrian and vehicle likely confounded the lidar: too complex a 3D surface, little return from radar. Is it a solid object or a swarm of insects? Also how well does lidar work against surfaces like textured dark clothing? This will be a learning experience for everyone, and Waymo is really out of place condemning Uber for this.