Hi
I bought a Edge 520 Plus with sensor bundle in September 2019. The unit picks up all the sensors. But continually drops then picks up the HRM signal. Thereby displaying either an inaccurate heart rate or no heart rate. Garmin swopped out the unit with a replacement, but the replacement performs in exactly the same manner. I'm using Garmin Connect on my iPhone 6 Plus, the phone picks up the unit and the HRM Bluetooth, and syncs correctly. Has any experienced this and was able to resolve?