Looking to see if anyone has had similar problems and found a solution. For a couple of months now, the HR monitor only works randomly and most other sensors are not working and reporting zero activity (e.g., sleep, steps, calorie counting, stress, body battery). I've hard reset the watch, downgraded the system software to several different versions, wiped all data from the watch to no avail. It's two years old. Can anyone help with this? If a bad update bricked the functionality of the watch, will Garmin replace it or am I stuck buying something new?