We had tons of riders visible, not on the rider list, who maybe were from the A and C and D events. The rider ahead of me in the list would be 5 seconds ahead, and there would be 15 other riders visible in between. This only started when we reached the point in the lead-in where you join the lap course.
To illustrate, see my mini map during the 8am CST A stage today, on February 3.
Those red dots on the map were indeed visible - first time I saw those, and they seemed to correspond to the “absent” riders. Some of the riders were in non-TdZ kit as you show, many were in event kit. Sometimes they all vanished, to be quickly replaced by a new wave arriving from behind.
My theory is that riders in the other groups - A, C, D and E in my case since I was in B - were somehow visible. That would be consistent with the C-cat riders getting UPG notifications: it’s as if the event was set up as a race with standard categories and all cats visible to all riders, rather than separate events. We had multi-lap courses in other stages, and this never happened.
Some of the riders were in non-TdZ kit as you show, many were in event kit. … My theory is that riders in the other groups - A, C, D and E in my case since I was in B - were somehow visible.
Actually, just to emphasize one more issue to the Zwift crew: I saw some riders who did not seem to be in the TdZ ride at all. I’m not sure if Robert’s original post or someone else mentioned this, but I know I saw at least one guy in non-TdZ kit with a workout screen active. If you zoom in to my minimap, you’ll see a few small blue dots, for example. (i.e. not the usual size blue dot that represents a C rider, I mean little blue pinpoints.)
Yeah, there were some of those, and riders going the opposite direction as well.
My ride yesterday is now fixed 
Thanks for the help.
Sorry but what is UPG?
Thanks
It’s a “disqualification” status on ZwiftPower, when a rider has performed above the category he/she entered.
