I‘m using my Apple Watch on a treadmill which allows the Watch connection to gym equipment, i.e. the Apple watch data such as heart rate is displayed on the treadmill monitor, and the treadmill data (such as speed) is synched to the Apple Watch.
When I review the data in Apple Fitness, I see the correct data, especially the average time/km for every km. The overall time/km is also correctly shown.
When I review the data in Strava, the average time/km for every km is incorrect. The overall time/km is correct.
It appears that Strava gets the calculated time/km from Apple (the data the watch would assume when not connected to the treadmill) instead of the synched data from the treadmill.
First Strava data (second picture with wrong data), then Apple data:




