Invisible player on TP fix

public class TeleportFix implements Listener {

    public Main plugin;
    public TeleportFix(Main instance) {
        this.plugin = instance;
    }
    private Server server;

    private final int TELEPORT_FIX_DELAY = 20; // ticks
    public TeleportFix(Main plugin, Server server) {
        this.plugin = plugin;
        this.server = server;
    }
    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onPlayerTeleport(PlayerTeleportEvent event) {
        final Player player = event.getPlayer();
        final int visibleDistance = server.getViewDistance() * 16;

        // Fix the visibility issue one tick later
        Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
            @Override
            public void run() {
                // Refresh nearby clients
                updateEntities(getPlayersWithin(player, visibleDistance));

            }
        }, TELEPORT_FIX_DELAY);
        }




    public void updateEntities(List<Player> observers) {

        // Refresh every single player
            for (Player player : observers) {
            updateEntity(player, observers);
        }
    }

    @SuppressWarnings("unchecked")
    public void updateEntity(Entity entity, List<Player> observers) {

        World world = entity.getWorld();
        WorldServer worldServer = ((CraftWorld) world).getHandle();

        EntityTracker tracker = worldServer.tracker;
        EntityTrackerEntry entry = (EntityTrackerEntry) tracker.trackedEntities
                .get(entity.getEntityId());

        List<EntityPlayer> nmsPlayers = getNmsPlayers(observers);

        // Force Minecraft to resend packets to the affected clients
        if(!entry.trackedPlayers.isEmpty()){
            entry.trackedPlayers.removeAll(nmsPlayers);
            entry.scanPlayers(nmsPlayers);
        }
    }

    private List<EntityPlayer> getNmsPlayers(List<Player> players) {
        List<EntityPlayer> nsmPlayers = new ArrayList<EntityPlayer>();

        for (Player bukkitPlayer : players) {
            CraftPlayer craftPlayer = (CraftPlayer) bukkitPlayer;
            nsmPlayers.add(craftPlayer.getHandle());
        }

        return nsmPlayers;
    }

    private List<Player> getPlayersWithin(Player player, int distance) {
        List<Player> res = new ArrayList<Player>();
        int d2 = distance * distance;

        for (Player p : server.getOnlinePlayers()) {
            if (p.getWorld() == player.getWorld()
                    && p.getLocation().distanceSquared(player.getLocation()) <= d2) {
                res.add(p);
            }
        }

        return res;
    }
}