We have an Alexa dot in our kitchen and one in DDs room. We’ve always been able to have both playing at the same time, DD either has audible or Spotify and we have Spotify and amazons free stuff. We just bought DS a dot for Xmas and it won’t play while DDs is playing (not sure about one in kitchen). She says ‘I can’t do this right now, try again later.’ If I can’t have DD and DS’s playing different things at the same time, there’s literally no point in DS having one. Any clarification appreciated!