So I've had the Fenix 6 Pro a couple of months now. And today I went for a run with the battery showing at 6h for GPS when I went into run mode. I completed a 20 min run then came back to the main watch face. About an hour later when I was out walking (without GPS) my watch turned off. When I plugged in to charge it showed the battery as completely empty. This has happened a couple of times now where the battery shows to be more than enough then suddenly it turns off. Has anyone else experienced this??