Last time I visited, I had several bouts of power sensor data that dropped off for several seconds (avatar coasts along). Some periods were longer than others but typically there were moments of 5-10 seconds lost. My Edge800 was fine and also TrainerRoad kept up too.
This also brings me to my next point of HR ANT+.
When I start a turbo session and I’m not all sweaty, my HR strap doesn’t signal very well for the first 10 mins. The problem is, once the sensor signal goes, Zwift never picks it back up again mid-ride like my Garmin does. It’s a bit of a grind to stop my session, get off my bike and go over to my computer to rescan for the HR signal.
Hope this helps and keep up the excellent work!