I stopped using ERG mode for intervals a while ago because I like to alter my cadence during intervals to shift the aerobic/anaerobic load. And I really didn’t like the death spiral ERG mode would induce. I have found having ERG mode off works much better, but I’ve noticed a new problem in that the trainer resistance tends to drift down as the interval goes on despite my keeping constant cadence and gearing. The change is less than a gear shift leaving me to fiddle with the resistance setting in the app which is tricky because 1) taking a hand off the bars alone changes my power, 2) there is lag between the app and trainer and 3) I don’t want to be fiddling with a touch screen with sweaty hands while I’m trying to survive a tough interval.
This really seems to me to be an issue with the Flux S so I guess my question is, have others had a similar issue with other models or brands? I have grown to despise all Garmin products but don’t want that bias to cloud my judgement.