OK, so this is very niche, but bear with me.
I did a race on Road Grand Tours, which then automatically synced to Strava. It gave me an average of 260 watts and a normalised power (taken from intervals.icu) of 270. Note that this tied in pretty closely with the back-up I recorded on my Wahoo Bolt.
However, when the ride synced from Strava to the Trainer Road calendar, the normalised power was boosted to 277, and the average power bumped all the way down to 230.
(Excuse language; I got dropped by the lead group on the first lap and ended up solo-ing the rest.)
Any thoughts on what might be causing this? I don’t think it can be anything to do with counting zeroes as there were so few of them.