Did the Zwift CP20 test and in the first minute the turbo resistance fluctuated and this caused considerable variation in cadence as I tried to maintain target power - unsuccessfully as the graphic shows the swings in power achieved. After a minute things settled down and power and cadence levelled off to much more stable values. I use smart turbo (Elite Direto) and had warmed up properly so I don’t think this issue was caused by myself not maintaining steady power in the first minute.
I know that for the CP20 test Zwift automatically turns off Erg mode and at first I wondered whether these swings were caused by differences in the gradient on the course. I doubt that this is correct as power and cadence were so steady for the rest of the test.Seemed more likely that the issue was in some way caused by interaction between Zwift disabling Erg mode and the turbo. Anyone else seen this and any comments?