Workout never ends if abandoned after E-stop

[nref]

To reproduce:

1. In the Android app, go to the WORKOUT tab
2. Start a workout by pressing DO WORKOUT
3. Press the E-stop button on the treadmill
4. Press DO WORKOUT
5. Observe that the treadmill does not start

Can also replace 4. with:
Go to CONTROLS tab
Press START
Observe that the treadmill does not start