My vivomove style has a problem with activities using phone GPS.
Yesterday i specialy made test and ride 3 km and stops. My bike counter show 3,1km. Google fit app show 3,08km, Watch show 8,3 km and max speed 155 KM/h !!!
Track on map is the sam like in google Fit app. GPS is used the same (google fit and garmin connect are on the same phone - samsung galaxy s10e)