Sonos v8/OS2.6 Music not stopping

[ControllAll]

I've upgraded to OS 2.6, and installed the new v8 Sonos drivers. Everything is working as expected, except that it seems that once all the rooms are off, the Sonos box isn't told to stop playing music, so it keeps on streaming away while nothing is listening to it. I seem to recall in the v7 driver there was a timeout value, where the driver would shut down the streaming after x minutes of no rooms being on. I can't find this option in the new driver. Has anyone else noticed this?

 

Thanks.