I use the Wahoo app to do a spindown calibration before every ride.
Yes indeed, the workout mode will engage ERG and artificially flatten the route. But my point was, I could really tell when the workout finished and ERG was disengaged. So I don’t think it was the trainer at fault.
Yes I quit the app every time I finish riding.
As I mentioned, the ERG smoothing was off, so I switched it on. I’ll see how future workouts go.
Thanks for your suggestions.