Using a tacx vortex, win 10 with Garmin ant+ usb adapter and Android companion app (latest version)
Tried three times to complete the tdz first two stages - every time everything behaves as expected for maybe half an hour - then, usually uphill, speed drops to 1 or 2mph even when I’m hitting 200w+. Then after a little while registered power drops to about 40w (no change in effort - I’m definitely doing 150+) and it never recovers. Took me an hour to finish the lead-in on stage 1, and impossible to finish the ride.
I’ve pumped up the tyres and calibrated the trainer using the tacx utility app before each ride.
Restarting the app seemed to help the first time, but not the second.