I've been having issues for a while with playback on my Sonos Connect. All my media is streamed from a NAS which is connected to my network using gigabit ethernet. When I start playing a song on the Connect it doesn't start playing straight away although I can see the progress bar moving along - normally playback starts 5-10 seconds into the song. If I then subsequently group the Connect with another one of my Sonos devices then playback stops altogether on the Connect (all my other devices are Play:1s). I have tried the Connect wired into my network, using a Bridge and also with the whole Sonos system in wireless mode and the issues don't ever get better (or worse). I have also tried the Connect playing back through a stereo amp and also through an AV receiver. The only thing I can think is that there are issues with the Connect itself - is there any way of diagnosing what?
Thanks in advance