While going through some of my old alts, I found that some of the White belt Min Qi lobbies are like this (Some can be entered as a white belt, some cannot).

I don't know if it is intentional, or if its a bug but if someone could explain it or fix it then please do.

I think its probably a matter of qi difference (2-19?) correct me if im wrong though.

Most likely a Gamemaster caught Simple or Octo spamming up one of the servers, and raises the minimum Qi needed in order to play in the server.