Wattages changed after ride

Known Issues
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1

Yesterday after I finished my ride I was feeling strong, so I hopped on a new free ride (the 3km crit circuit in Glasgow) to see if I could set a new max power PR.

I sprinted and Zwift said my 5 second average was 981W and I finally unlocked the 1000W badge.
I finished the rest of the route but afterwards when I checked my power curve (as well as the ride stats in my feed and the stats in my synced activity in Strava/Garmin Connect) it claims my max wattage was only 971W.

My new record 5 second average according to my feed is only 866W, over 100W lower than what I actually reached while riding?

I could see the 1000W vs 971W be explained by one being the absolute peak reached and the other only storing the 1 second max (meaning I would have hit 1000W but only for 0,25 of a second orso?). But the 5 second average being 100+W lower than what I could see in the side display while riding just makes no sense?

Riding on a Macbook Pro M4, with a JetBlack Victory trainer and a Polar H10 HRM. Everything is recorded in Zwift directly, and only then synced to strava/garmin. I also use the companion app should that matter.

2

this appears to be a bug

3

Hi @Nick_Ramaekers

Thanks for the report. We’re treating this as two separate investigations - one on the Zwift side, and the other when sending to Strava. We’ll update this thread when there’s progress to report.

4

Thanks for the feedback!

The strava data matches with the eventual Zwift data as far as I can tell, so there does not seem to be an issue there. As far as I am concerned the only issue is the difference between what Zwift registers during the ride and what it shows afterwards.