Guest wifi network clients disconnect after RT-AX86U Pro firmware update

[KG49]

After updating RT-AX86U Pro firmware to 3.0.0.4.388_24198-g380c137 yesterday 11/17/2023 the thermostats I have on the guest wifi network keep disconnecting. At the thermostat I can forget the guest network, then reconnect. The connection only lasts for a minute before disconnect. This is a new issue after firmware update. These are Honeywell TH115 thermostats using the Total Connect Comfort app for remote access. A Rachio sprinkler controller on the guest wifi is still connected.

I did reach out to support.  Any suggestions?

[jzchen]

After noticing  various connection issues on guest network SSIDs I ended up eventually turning guest network off and putting all my IoTs on the main SSID.  (This is a different router, a  GT-AXE16000)

I’d suggest moving the ones having trouble over to the main network…

[KG49]

jzchen,

The thermostats do keep a connection to the regular network, but I don't want to keep this setup. They were on the guest network for security reasons and the problem only started after the latest firmware update.