Fitbit has admitted to two software issues with the Charge 2 that cause it to incorrectly display the distance it tracks. According to Fitbit one of the issues is related to the Connected GPS and when it’s used with a few modes like wall, hike, or interval. The other is when using multi-sport tracking for run and treadmill activities. The company says they have already fixed the issue through a free software upgrade.
"These software errors caused the tracker to occasionally calculate stats like pace and distance with less precision than we expect from our products," a spokesperson for Fitbit told The Verge via email.