Am using Wattbike Atom NG - used to be on a Wahoo Kickr - and their appears to be a bug that affects the variability of power shown in ZWIFT in ERG Mode.
The power shown on the Wattbike Hub appears to be pretty smooth and on-target but the power numbers in Zwift are all over the place (the 3 second smoothing is on). This was a simple Z2 to Z3 interval session - same 4 intervals repeated 3 times see screenshot below. If I was using the Kickr as previously I’d see almost fully straight lines.
Can’t believe that WB Atom is Zwift certified as claimed if there is this much discrepancy in power