So after updating to the new Controller - the connection to my Sonos system has become VERY unreliable. In all cases it is solved either by power cycling router or just waiting ages and keep trying.
The router does drop out now and again - but even MS Teams can deal with glitches - so why is Sonos so bad at dealing with tiny blips in wifi ?
Never happened on the old controller - seems like a windows vista moment for Sonos.