Hello there!

I have a One Sl and a Symfonisk. Both are in a separate room (kitchen and attic). When I’m listening to Spotify from device A on the Symfonisk and then some starts Spotify from device B (not the same Spotify account) it stops my music on the One SL. I would expect they would both keep on playing since the Spotify accounts are separate and the rooms are separate as well. 
 

Am I missing something here?