I haven't looked into this yet, but on the newest version, the bot started seeing the domain txt.voice.google.comundefined instead of txt.voice.google.com
This led to it creating new rooms for each user, and being unable to send messages to people as it goes to undefined.
This isn't a problem on commit 767dca2, but is as of some newer commit. For now, I've gone back to the old commit, but when I get time I'd like to look into why the bot is doing that.