I get the Hypixel AFK screen in personal servers.

I went  to Hypixel but had to do something so I went afk it showed the AFK screen but That's when I disconnected from Hypixel to play a personal server but, On the server I had the AFK screen. I tried disconnecting from the server and reconnecting but it was still there and I had to close the game and reopne it to get rid of it.