I have an Apple Express connected to the Kitchen Connect on the LineIn. It works great streaming youtube to it from my iphone/ipad. However, if I add other Connects (Lounge, bedroom etc) then they will all play the first track but then only the Kitchen plays the next track. They still show in the group but I have to ungroup and regroup.
I have tried this with the other connects and they all do the same thing. Grouping and playing from the Sonos library is fine.
Latest firmware on all devices.