Since the new update, there appears to be a location based bug on the Volcano KOM where all riders disappear at different points on the Volcano KOM climb. This has been verified across multiple users that it is not caused by a local issue/network dropout and occurs at the exact same spot on the course. It also appears that when the riders disappear, their shadows, overhead name tags and ‘riders near’ name tags all still appear, just not the riders avatar.
See videos here of Fusion ECT race of 5th August:
https://www.youtube.com/watch?v=yHi3FKifiiw&feature=youtu.be&t=3585 (see 59:45 onwards)
https://www.twitch.tv/videos/463433228 (see 48:00 onwards)
https://www.twitch.tv/videos/463432031 (see 35:15 onwards)