Garmin FR645 Livetrack is sending a link, but no data. This is an important safety feature and I need it to work correctly. The app is updated on my iphone, the software is updated on my watch and no settings have been changed. It was working great, so I don't know what happened. I don't start an activity until the GPS turns green and connects. I've uninstalled and reinstalled the app and that did not help. Suggestions?