Fenix 5 and Edge 530. After MTB ride recorded by Edge 530 with Garmin HRM lactate threshold BPM falls to 46 in Garmin Connect. It returns back to normal after running activity recorded by F5 with the same Garmin HRM. Next MTB ride - again 46! First time i noticed this issue sometime in April this year. Fenix 5 and Edge 530 show correct LT BPM in user settings. During MTB ride heart BPM at the the Edge screen are in order. I have no idea where Edge finds this low BPM.
