我的命令/消失有问题：当我消失时，一个玩家在我消失后加入游戏，他可以看到我。下面是命令和playerjoinevent+UpdateVish（）的代码：

if(commandLabel.equalsIgnoreCase("vanish")) {
        if (player.hasPermission("vanish.permission")) {
        if(!vanish.contains(target)) {
            vanish.add(target);

            if (player == target) {
                player.sendMessage(ChatColor.BLUE + "Ora sei in " + ChatColor.LIGHT_PURPLE +  "Vanish" + ChatColor.BLUE+ ". Nessuno ti potrà vedere");
            } else {
                player.sendMessage(ChatColor.BLUE + "Hai Impostato " + ChatColor.DARK_BLUE + target.getName() + ChatColor.YELLOW + " in " + ChatColor.LIGHT_PURPLE + "Vanish");
                target.sendMessage(ChatColor.BLUE + "Ora sei in Vanish. Nessuno ti potrà vedere");
            }
            for (Player persone : Bukkit.getOnlinePlayers()) {
                if (!persone.hasPermission("visible.vanish")) {
                    persone.hidePlayer(this, target);
                }
            }
        } else {
            vanish.remove(target);
            for (Player persone : Bukkit.getOnlinePlayers()) {
                persone.showPlayer(this, target);
            }
            if (player == target) {
                player.sendMessage(ChatColor.RED + "Ora non sei in " + ChatColor.LIGHT_PURPLE +  "Vanish" + ChatColor.RED+ ". Tutti ti potranno vedere");
            } else {
                player.sendMessage(ChatColor.RED + "Hai disattivato " + ChatColor.DARK_BLUE + target.getName() + ChatColor.YELLOW + " dal " + ChatColor.LIGHT_PURPLE + "Vanish");
                target.sendMessage(ChatColor.RED + "Ora non sei in Vanish. Tutti ti potranno vedere");
            }
        }
        } else {
            player.sendMessage(ChatColor.RED + "Non hai il permesso di usare questo comando");
        }
        return true;
        }

这里是playerjoinevent+UpdateVish（）

@EventHandler
public void OnPlayerJoin(PlayerJoinEvent e) {
    updateVanish();
}

public void updateVanish() {
    for (Player persone : Bukkit.getOnlinePlayers()) {
        if (vanish.contains(persone)) {
            for (Player persone2 : Bukkit.getOnlinePlayers() ) {
                persone2.hidePlayer(this, persone);

            }

        }
}
}

谢谢！