Hidden voice channels being 'joined' on mobile

When in a hidden voice chat "Streaming to [server] may show up and on mobile it allows a user to join the chat. I haven't confirmed if thr user actually connect and can chat though. When in a hidden voice chat "Streaming to [server] may show up and on mobile it allows a user to join the chat. I haven't confirmed if the user actually connect and can chat though. https://imgur.com/a/0QYhOYZ