@Inaalex At some point, perhaps your GPS connection dropped? Or the exercise stopped using GPS tracking due to low battery? I find the software glitches sometimes if you did everything correctly. Just this morning, I manually started a run, GPS had connected, and I manually ended the run when I was done an hour later. Yet when I sync with my app, the Run is not tracked at all. And separate issue, I then tried manually logging the activity but it doesn't save (I believe it's a known issue where logged exercises do not save).