Interesting catch – I paired my HRM600 using Bluetooth Secure like Garmin suggests, and the Forerunner confirms this by showing 'Secure (BLE)' under connection status. But after 2 weeks, 10 runs, and over 140km, I still have zero Running Economy data. Today I realized the HRM is blinking 3 times – which means 'open connection' despite the watch saying 'BLE Secure'. What a pain to set up...
