In two servers a the same time in one client

So, I tried to join a server but was kicked, reason doesn't matter. When I joined another server (my own server), no chunks were loaded. I discovered I was in two servers at the same time, I could see the scoreboard of the first server and tablist of my own server, the time tried to synchronize which made it look buggy like shown in attachements. I also received chat from both servers. All functions of both servers were working.