Since the 12.70 update, I’ve done 6 runs and every time, after saving the activity, the watch adds 10 meters more to the total distance, as if it were rounding up (similar to Strava activities).
For example: I press STOP on the watch exactly when the data field shows 12,00 km, but after saving, both the watch and Garmin Connect display 12,01 km. Or instead of 8,50 km it shows 8,51 km, etc.
The same used to happen with average pace: the data field showed 5:24 min/km, but after saving the activity it added one second - 5:25 min/km.
I’ve been loyal to the Forerunner line for many years, and this has never happened before - only now with the FR 970 after the update.
I should note that the routes were always different, with no signal obstruction from buildings, bridges, or tall trees. Satellite visibility was excellent.