This has happened twice now:
I do some exercise and confirm it's been recorded on the watch. I upload to Garmin Connect via Garmin Express and all seems fine. I go to Garmin Connect to view my activity and see there are no new activities added. I check the watch and not only the latest activity is missing but a few earlier ones (which are actually on Garmin Connect) as well!
This is terrible! I'm doing a strict routine and need to show my coach my progress and now twice I have lost my activities!
Please can you explain what is going on!?!