Crazy watt data

I have tried everything. Re-installed app, re-booted apple-tv. But still watt data from the zwift is like 50% lower and some times higher compared to normal. And normal is data sent from my Elite Suito trainer to my garmin edge.And when usiing vector pedals the data are still correct. On top of all this, data from the zwift app and companion also varies. Anyone who knows why this is happening? I have used zwift an my suito trainer for years without any problems before I jumped on my bike again this indoor season.