I’ve just bought a Garmin Edge 130 plus from Amazon. I’ve had it less than a week. I’ve done 3 indoor training sessions using a wahoo speed, cadence and a polar H7 HRM. Tonight the heart rate strap although showing as connected wouldn’t display in the field, it just displayed —-. I’ve tried removing and re paring several times. Hard boot, reset. Still doesn’t work. The strap works fine and checked with my polar M400 watch and my iPhone with the wahoo app. I’ve changed the battery in the strap, makes no difference. Works fine on everything but the edge 130 but was working fine before.