Balena sound refusing to work in standalone mode

I have two Pi’s on the same network and have entered device variables on both of them to work as standalone devices: SOUND_MODE = STANDALONE but they are still working in multiroom mode where whichever one I connect to, I hear the sound on both.

What am I doing wrong?

On another note, a lot of the document links seem to be broken so it’s difficult to find information on this problem.

Thanks!

Hello, when you added the SOUND_MODE device variable, was “All services” selected for the “Service” drop down? Also, what model of Raspberry Pis are you using?

Yes, ‘all services’ was selected. I’m using Rpi 3B 1gb.

Thanks.