Someone discovered that you can connect to (at least) 2 servers at the same time if you are quick and you have a bit of lag (~300ms)

Here's how to reproduce :

• Start connecting to a server
• Cancel the connection quickly
• Connect to another server

If it happens to work (based on your lag mainly), you're connected to both servers. You can see both chat, both scoreboards, ... The thing is you will send your inputs to the first server while your client think you're on the second one.

If you're on the same coordinates, you will see the second server map, move like you're on this server, eventually fly if you're on creative but the game will send your movement to the first server, which has a totally different map, making you able to glitch through blocks and fly over them.

Link to an explaining video (in french) : https://www.youtube.com/watch?v=HRHP0FCfHX4

PS: I'm sorry if my explanation isn't clear, my english is not great and it's a bit hard to explain