Take a look at this Strava leaderboard for a popular Tacx training segment.
Tacx - Roquelaure KOM | Strava Virtual Ride Segment in Roquelaure, Occitanie, France
The KOM did it at 227W power, but some of the other athletes further down the list were apparently cranking out over 800W! Is that even possible? I know weight is a factor but how can 872W be slower than 227W? Of course it's just for fun and doesn't really count for anything but I suspect this discrepancy might indicate some kind of bug in Tacx or Strava.