I wondered if anyone has had the same experience as me? I have 3 echos, two dots and a sub working with two of the echos. Until recently i had a speaker group('Everywhere') set up to include all by devices and it worked fine. In the last week however the group has stopped working. Each speaker connects with Spotify and plays, including my sub-woofer group, but when I try to play on the everywhere group I get no sound from any of the speakers, although I can see it playing through spotify. I have reset all the devices, deleted and re-set up the group and sub-woofer group, but still cant't get it to work. I have recently added two smart plugs that work ok but other than that, have made no changes to the set-up. Internet signal is strong. Any ideas? There doesn't seem to be any way of contacting Amazon to discuss this issue and it is very frustrating.