While on the "Servers" tab from clicking "Play" in the start-up menu, the server "Mineplex - EU > UPDATED SKYWARS" has some glitchy green text next to it, I'm not sure if it's meant to be there but on closer inspection of taking a few screenshots, these letters are just literal jibberish.
Showing a screenshot doesn't justify what it looks like, it changes the letters super quickly so you can't actually see what it's saying without taking a screenshot.
Thank you for your report!
However, this issue is Invalid.
Unfortunately we don't accept issues related to External Servers here on the bug tracker, but please add more details if you think this also affects multiplayer over Realms, LAN, or XBL.
I'd suggest contacting the server owner directly or seeking help on the Minecraft forums.
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