Using a Gen 1 Kickr the resistance decreases with uphill gradient and increases with downhill gradient in Erg mode. This is the same if I’m controlling using TrainerRoad Erg workout or Zwift Erg mode. Trainer connected by ANT+ in Zwift and Bluetooth for TR. Power reading on screen remains constant, have tested this blind in case it was some kind of mind trickery, but it is a genuine change in resistance. Very frustrating makes erg workouts in Zwift kinda pointless.