A bug that kicks all players out of a server

If a player were to type @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a @a (You get the point).this kicks all people off, though this only works when there are enough players on to kick everyone
doing this kicks all players although server keeps running