after the latest update - I already reset the device to factory settings - as soon as I start an activity, the device tries to switch to the BT-HRM. I get asked whether i want to switch to this HRM. Either after accepting or declining, the question message gets asked again. decline - question - decline - question ...no other inputs via buttons possible as this message keeps staying in front. This happens roughly 50 times. Then, for no obvious reason, the activity continues. only solution: hold power button until restart.