I’m sure I’m not the first to spot this but is there an issue with Zwift or Strava recording constant speed on some segments such as Petit KOM? Loads of rider’s Strava logs showing a nearly constant speeds of around 28.6 mph whether it’s up or down and irrespective of power output
They are hacking the system. Probably to get the Tron bike. Zwift does not care. Apparently it only matters for UCI sanctioned events.
Too many, it must be a glitch as its not consistent either
Some strange things going on in Strava with that segment! 
I’ve been digging around on this and I noticed the wattage people were using wasn’t crazy. They were just flying. And then I noticed almost all of them were meetups.
Turns out it’s a meetup glitch. If you turn the rubber band mode on you sometimes move either unreasonably slow or unreasonably fast for your wattage and it stays at a relatively constant speed.
Or this - Can't U-Turn [October 2021] [1.18.0]
I have seen this glitch with meetups for quite some time now. Seems as though meetups 6 and smaller the 25+mph glitch happens. For non-climbers its great when you are on a hilly route. I do not see this happen in my larger meetups, but it is 50-50 with the smaller ones. Sometimes the glitch will start, but then go away mid ride. I also seem to see it when my meetup is not a guest world. Not sure if there is a connection or not.