Hi,
I have an issue regularly (once every 15 days approximately) with my SYMFONISK and my livebox 4 (Orange France ISP). Every Wifi devices are working properly but the SONOS devices are unreachable from my iphone (SE 2020 with latest updates). I have a wifi repeater and several wifi devices in many rooms and they are all working fine. Each time, I have to reboot my livebox 4 in order to connect to my sonos devices again. It is not a big thing but this is these little things that prevent you to enjoy the simplicity of the Sonos environnement should be.
Does anyone have some hint on how could I investigate further in order to put the Sonos engineers on the way to solve this issue ?