I have installed the CORE Body Temperature Monitor DataField on my Garmin Edge 530 numerous times and displayed it on my primary screen. When I plug the Edge into my computer to sync/charge, the datafield is removed so the next time I use the device, I see the previous data field in its place and there is no "Connect IQ" menu option in the list of data fields to add. This happens half the time I plug the device in - sometimes the CORE data field is there, sometimes it's not.
What is required to make sure the datafield remains available and in place while syncing via Garmin Express?