Posting despite old archived issue as there is no discussion on said issue. https://forums.garmin.com/sports-fitness/cycling/f/edge-explore-2/411742/bug-in-firmware---problem-with-ble-profile-register-of-engo-2-activelook
Using BluetoothLowEnergy method registerProfile is failing in my data field. As the above post references, the issue cannot be reproduced on other devices running the same example.