Server banned user probably because of anti-flood?

as the title says server banned user probably because of anti-flood, but user isn’t in ban list, so I can’t unban him.
Im assuming its anti-flood or smh because server banned him…

in Logs on Teamspeak is says only this: client disconnected ‘keno’(id:3261) reason ‘invokerid=0 invokername=server reasonmsg bantime=0’