Thanks for the clarification @cohenfive, I am just trying to collect as much detail as possible to properly diagnose the issue. Yes I was referring to your mobile device, and if I understand correctly both you and your wife are logged into the same account on both phones.
Do you happen to remember what type of notifications you received from the few days that you were receiving notifications from the mountain home controller?
I took a look at your account and it looks like there is currently one Notification option that is not enabled, the "Notify me when the status of my watering schedule changes".
Try logging in from one of your mobile devices and enabling this notification for your Gen 2 controller and see if this improves the situation.