I track two activities a day. First a 1 hour cardio session and then a swim session. My phone is near me both time. The cardio session says it syncs with me phone after I save it. The the swim session does the same.
When i get home and look at my phone, only the swim session shows up. If I sync with Garmin Express, they both show up.
I have tried Version 8 and 8.45. I have wiped the watch.