Sometimes you have to look at the session wrapper vs the first record if there is already a distance on the first record.
It's only a few meters at most though when it happens.
Doesn't happen all the time though, I'd guesstimate maybe only 10-20% of the time
Is that from a "flying start" when running/cycling vs starting from standing still?
Or is it because maybe the watch has so many items to write to the file before the first record that sometimes it takes a second or two and some distance has been covered?
At first I thought it was maybe when "smart recording" is turned on but I also see it in some 1-second recording files.