never had that spike issue with ramp tests on my Drivo, the increments are small really so maybe there was a different issue, drop out which it tried to recover from ? … (PS: I also feel the operation is less solid via Ant+ versus Bluetooth… i had no issues with my previous turbo on Ant+ (same position etc.) yet this one does comes up with message “pedal to resume” for a mere second a few times in a 1hr workout… i switched to iPad and its been fine.