I’ve seen other reports of this; now it has hit me. Same WiFi, same location of access points, same location of Rachio 3. After one year trouble free; now, more than half the time, going into the app shows “controller offline”.
It comes and goes. I went through trouble shooting, picked #2 is blinking and performed a reset of Rachio’s WiFi (as suggested). No help. Connectivity still comes and goes.
The only thing new is iOS 13 on my iPad and iPhone. Would tech support please have a look? Also, would you send my controller the -630 firmware?