I have a system which covers six rooms. It includes two Play 5 stereo pairs, an Era 100 pair, and three Sonos Ones. I prefer to have them as a single group. I do not know whether this is related to the new app disaster, but I cannot maintain the group. SiriusXM will be playing fine everywhere and then it is only in one room and there is no group. Sometimes the group only partially fragments. I do find it difficult to define the group using IOS or Android app. Defining the group using the app on my Mac OS/X usually works. I do have Alexa, but never have used it to issue commands to Sonos..
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