Why does this shows on my screen? I'm not even afk

This already happened to me earlier but I ignored and left the server and Minecraft as a whole, but now as I came back I didn't had it initially but it showed up again, right now I relogged (didn't left Minecraft) but still had it on my screen. I'm on Creative btw.

 

Oh wow I just realized that the message is from a another big server because when I logged back on it the message didn't showed up but then when I logged on another server, it showed up as well and showed up when I logged on MC Central again, help.

 

Looks like the issue is that I logged straight from the big server into MC Central since I was kicked from being afk at the big server.