@tlasman - So what changed in the environment, as it was connected? Any ideas?
I'd run the RouteThis app and send to Rachio. Also, has the Rachio been power cycled (I hate suggesting that, but sometimes it fixes things).
Any firewall rules on the router or gateway?
I'm just a community member, so I don't know what Edwin suggested and what has been tried. Any more details on the setup - internet provider, router, etc.?