What I’m wondering is if whatever formula is being used is taking into account the workout that Zwift puts into Next Up even after you’ve already done a workout for the day. (Why it does this in the first place is another point of contention, of course.) Then, on the next day when it knows you didn’t do that second workout, it ‘corrects’ itself. Of course, them it is likely taking into account what’s in Next Up for the current day, whether that’s what you’ll actually do, or not. 