We just had our IRO installed.
Here is what happens:
A) Log into rachio page or use the app (same issue on both).
B) Start manually watering zone.
C) Stop watering OR let manually watering end by it self.
D) Zone continues to water.
E) Unplug rachio.
F) Zone stops watering (valve closes).
So basically, rachio can turn on a valve, but will not turn it off.