Yesterday and today i had same troubles with meet.jit.si service.
Firstly the participants joined the ROOM and than the participants of the same ROOM with the same name were splited in half, 5 participants were toogether, 8 other participants were together, and they couldn’t communicate talk or hear others, also participants had difficulties to rejoin the splited ROOM.
Then I created new ROOM name, I informed the participants, they joined the new ROOM and the problem disappeared.
Just wanted to report this so maybe you can figure out what is causing it.