I am using Sonos at home and in my office - when I go from one network to another, the previous network’s speakers are showing for many minutes, until the list is refreshed.
This wasn’t an issue a few months ago - I do this switch every work day, and now it has become a problem. I can’t find a way to force a refresh of devices. Very annoying - Even if I have been on the network for a good while (hours), and open the app, the list is still showing the devices from my previous network.