@jaeross I did some research and it looks like after one of your zones finished the device fell offline.
It looks like over the past few days the device is having trouble staying connected, and continuously falling offline and reconnecting.
If you power cycle the controller the schedule will be marked as complete and won't show as watering.
The controller RSSI (signal strength) is right on the border of being very weak (-75).
I might get a range extender (or get the controller closer to the router) and see if that helps.