I am having the same problems! I had it on Smart Watering and thought maybe the heat wave with 100 degree days had something to do with it. I took it off Smart Watering and today it went on again mid afternoon when it was only 72 degrees. The history does not reflect the time going off at these random times.
I am having the same problem in June 2020. Is my software updated automatically or do I need to do something. The sprinklers are coming on in the afternoon when I definitely do not want them on at that time.