@bjlockie 

Hi, the logs are related to the fast roaming protocol of Deco.

And may I know what are these devices that dropped the internet frequently?

It seemed like they might have some problem with the roaming performance. and It is suggested to turn off the "Mesh Technology" for these devices on the Deco APP.

@bjlockie 

 In this way, the log might stand for multiple meanings and I would check with the senior engineers again. Sorry for the inconvenience.

As for the two mobile phones, have you tried to turn off the Mesh Technology on these two devices?

Could you please tell me more details about what happened when these two phones got disconnected?-- like they are still connected to the Wi-Fi but the web pages are not loaded; after a few seconds, it is working again then it would repeat after a while.

Since the 2.4ghz is easily affected by the wireless interference, would they be much more stable when connecting to the 5ghz?

Moreover, I used to see some feedback from other users that the random MAC address might cause some trouble, and could you please also turn off the random MAC address and use the actual MAC to have a look?