Gen 1 Valve locked open when going offline

I have the Gen 1 for over five years now and it works great. A couple of weeks back when I was out of town, the sprinklers came on and remained on till I got called about street flooding. The controller had gone offline right after Zone 1 started, and stayed on for 6 hours till I had a neighbor go in and reset the controller - which resulted in the sprinkler going off. This is worrisome since I thought the program was run correctly even when the controller was offline. This morning I once again see that the controller was offline but it was after the cycle so no flooding this time. Any suggestions?

…attached is the log that shows sprinker went on at 1:00 AM and had someone else turn it off at 6:57 AM as it kept watering.

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