I added Amazon music over Christmas and it has been largely unusable. Often music will play through my Play 5 in the office for say 4 tracks and then stop with the message, "Unable to play 'TRACK NAME' - the connection to Amazon Music was lost." It will try to play the next song in the queue then the next and so forth until it stops and reverts to the beginning of the queue.
I do not have problems listening to tunein radio or tracks from my NAS, it seems to only be Amazon. It would suggest that the problem is not local to my network but I am happy for someone to provide a better insight.
I raised this in https://en.community.sonos.com/music-services-and-sources-228994/unable-to-play-music-6818176
but was unanswered.
I have since submitted another diagnostics 111914164 as was wondering if someone could help?