Roon stops playing when any endpoint (not in use) disconnects

Look at the log entries above in this thread, in the posts from May 4 and May 5.

See also

I can provide lots more examples if necessary. This was particularly bad when I had a Pi 3B+ running RoPieee and using WiFi in a corner where it dropped off the network a lot. Even though the Pi wasn’t playing anything, every time, the streaming to my Chromecast Audio would stop.