Reboot required after doing 1st workout.
I have had an issue that after doing 1 workout, I have to restart the app in order for it to give normal user response before starting a second workout. Response time is usually slow, sometimes the video will not work, or it is not able to pair my devices.
I am not sure why restarting the app seems to resolve things but it does. Also I am still having random issues with videos from time to time. By random I mean sometimes it works without a glitch other times it freezes until I stop pedalling.