I had a similar experience last summer, and it corresponded to changing to a different router. I have a WiFi 7 capable router, which has 2.5GHz, 5GHz, and 6GHz networks. Initially, I’d set the same SSID and password as I’d used previously, and the Rachio would connect, but periodically it’d drop and not be reachable thru the app, and the controller would be searching for connection. I’d power cycle it and it’d work fine for a day or two and go back to the disconnected behavior. My router also has the capability to run both Guest and IoT networks. I enabled the 2.5GHz IoT network, gave it a different SSID and password, and then attached the Rachio to that 2.5GHz network. It’s been completely solid ever since. The only thing I can come up with is that it didn’t cope well with the old network being on different frequencies, and it’d lose connection. Not sure if this will help in your situation, but if you can enable a discrete 2.5GHz network separate from any others and try to attach to that, it could benefit.
