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> and one client is forced into listen mode. Is there a way to stop this so I can test without having to build each time?

I don’t follow. And I’m pretty sure one has to be a listen server or it won’t work.

> And also is there a way to check if the connection to server was successful when using execute command “open [ip]”?

If it opened the level and gamemode that would be a successful connection, no? Fire an event when that happens?