Hi, we have been seeing disconnect issues with a four room speaker Sonos Play system. Sonos support have advised that the BT Smart Hub 2 Wi-Fi should be set to Mode 2 which seems to have fixed the issue. You’ll need to logon to the BT Smart Hub 2 as admin to do this. I did this on two separate BT Smart hubs and both got stuck with the saving the change message (usually they save new settings ok). If this happens just wait a few minutes with the saving message displayed and then restart the hub. Then recheck the settings, for both hubs we changed they had stored the new Mode 2 Wi-Fi setting correctly, despite being stuck in save mode.
BT info. re. Wi-Fi mode settings:
The modes are: Mode 1: Gives you the fullest featured wireless, maximising speed and range. Mode 2: Some devices can sometimes struggle to use the latest wireless features. If you have any devices that can't get a good wireless connection, try using this mode.
See the following for more info.
What is the wireless mode feature on my BT Smart Hub?
I hope this helps!