I have edge 820 and bkool smart trainer and, started the smart workout - “Hot blooded-2” or another smart workout. it control resistance of the trainer and it seems all good to go but after few minutes(passess aprox 3 or 4 intervals) it freezes the display. you can pause workout or select trainer menu, but in the main workout window all data some kind stopped and did not change. i dont know what to do, tried reinstall app several times. 
Hi Justas - we saw that you sent a note to Support, thank you. We can help you out from there…