Wasn't exactly sure where to post this, since it affects ALL devices. I currently use iMac, iPhone, and Sonos. When I'm playing a playlist in Shuffle mode and switch from my iMac to another device mid-stream, the shuffle order resets and it starts playing songs I've already heard. WHY does it do this? Why doesn't it finish the existing playlist order?

To be clear: I'm NOT shutting down the app and opening it up on a new device and restarting the playlist. I'm simply switching devices (speakers) within the app to listen in another room or location. 

UPDATE: Spotify Cares on Twitter says "This is expected behavior for shuffle play. We can see how that’d be handy." Seriously? Why would anyone want a playlist to restart when they switch devices in the middle of playing it?