I have run into a failure today trying to manually run a schedule. There are three zones on the schedule. Also, the system rain sensor is activated (which is why I wanted to run the schedule manually.)
I start the schedule by clicking on "run schedule" in the schedule display. The UI says the schedule is running, but there is no watering happening. also at the end of the time for the first zone, the UI stalls. It does not move on to the next zone nor can I stop it by clicking on "stop". The only way to clear this is to do some other manual watering.
I have since used the individual zone watering and with this path the watering does actually happen and it stops after the anointed time duration.
If I were to guess, I suspect the rain sensor is mucking things up. So I also request a new feature--the ability to exclude a zone from the rain sensor handling.