"Already connecting to this server!" (spam) when connecting a player via Plugin Messaging Channel

I have an odd issue. I've created a server selector for my hub, and it's work great and all. The only issue that I have is that you get spammed with "Already connecting to this server!", and it gets worse each time, as it sends that message as many times as someone has used that method to connect to a server.

Here's what I'm talking about:


Here's the code that I'm using to send the player to another server:
"Already connecting to this server!" (spam) when connecting a player via Plugin Messaging Channel