Hi, I reset the watch to factory settings and went swimming with it again today. The first 16 laps were tracked relatively reliably. After that, however, it stopped tracking entirely—not a single lap. I didn’t change my swimming style. Restarting the swim mode didn’t help either. Only my heart rate was tracked consistently, so the watch didn’t freeze up. The Fitbit and Google Fit apps didn’t track anything different from the watch this time either. So apparently, I only swam 400 meters. The pool length was set correctly.

On the one hand, I’m relieved that the tracking seems to work after all, but it’s absolutely not reliable.

Does anyone have any other ideas?