When you are trying to use the transfer command it does not check if the player is already in that server.
How to reproduce the issue:
Make two dedicated servers.
Open the server.properties file, and change the server-port to 25566.
Start the servers.
Connect to it, and type this command: /transfer localhost 25566
Once you are connected to the server, type the same command.
Notice that you can connect multiple times to the same ip, same port.
Expected Behaviour:
There should be a message in chat that says "You are already connected to this server." which would prevent the player to join twice to the same server.
Actual Behaviour:
The player can connect to the same exact server multiple times even if they are there.
Comments 2
It can be bad if someone tries to connect over and over again, because if they did it can spam the chat with leaving and joining messages, and i think it's important to not allow the player to join multiple times. It can be helpful for let's say the player makes sure he is in that server. He would know if it says "you are already connected."
Could you please describe in more details how this negatively affects the game?