IP connects to wrong server

I just wanted to point this out in case it's an issue that other people have had, but when starting a server, the console said that it properly started, but when connecting, it connected to someone else's server. Restarting seems to have fixed the issue, but I just want to point out this issue so that people know what to do if they try to join their server and it puts them into the wrong server. I hope that this is not a recurring issue and hope to bring it up with the Aternos mods.