+1, I notice also that, received video freezes on first caller. User doesn't know the problem an thinks that is network issue. It should show a message if connection with vMIX is enabled or there is communication error by showing black on video.

But I think that isn’t’ good practice to give the same id to multiple users. If you want to add a new connection just edit vΜixΨall input and press change. A new connection will replace the original shot. From the other side this password is random, but even then someone can make a script to test random numbers, I don’t know is system can block a user after X attempts (I believe that it can).

I think the reason for this behavior is because sometimes users just make a refresh of their page for several reasons, so they design it like this. But a check if the sessionID or IP is the same should allow to connect again or reject the connection until first user close his browser. Additionally, I think that vMix must have an option to “kick” a user off, so if a user forget the window open as "admin" to close his connection.

Grouping with all the other thread about this issue.