That was precisely the problem we had (and I was that random person, in our case). Like I said, went to Roll20 tech support and they basically gave up after some basic troubleshooting. (They claimed they'd look at the issue long-term, but that was months ago.)We tried using Roll20 audio for a session and didn't make it very far before we switched that over to Discord. We kept having problems with 1 seemingly random person not being able to hear everyone. No idea what was going on with that.