2 year old instinct will not stay connected to chest HR monitor. Often it takes a hour or more to just connect. If it does it will quickly loose connection. It use to work no problem. The HR monitor has new battery and connects to phone fine. Sometimes the watch will loose pairing with phone as well and I have to complete initial watch to garmin connect set up again. I have tried a factory reset but same results. Has anyone had any experience like this. If so what was the solution.