Once you press the start race button, it's not possible to cancel the heat or swap out contestants in that heat. A heat should be cancelable after its start.
Notably, once a race is started on a sensor like the DT-8000 that requires a start signal to enable the gate trigger, the start signal can't be undone. However if the cars go and times are recorded by the sensor, times will be ignored in the app when there is no active/started race.
I would not like to allow contestants to be swapped out in a heat that has been started. This might too easily be done accidentally, which would likely result in times being recorded for the wrong contestant.
Once you press the start race button, it's not possible to cancel the heat or swap out contestants in that heat. A heat should be cancelable after its start.
Notably, once a race is started on a sensor like the DT-8000 that requires a start signal to enable the gate trigger, the start signal can't be undone. However if the cars go and times are recorded by the sensor, times will be ignored in the app when there is no active/started race.
I would not like to allow contestants to be swapped out in a heat that has been started. This might too easily be done accidentally, which would likely result in times being recorded for the wrong contestant.