Bukkit Teleport Invisibility Fix

TeleportFix.java

package com.comphenix.example;

import java.util.ArrayList;
import java.util.List;

import net.minecraft.server.EntityPlayer;
import net.minecraft.server.EntityTracker;
import net.minecraft.server.EntityTrackerEntry;
import net.minecraft.server.WorldServer;

import org.bukkit.craftbukkit.CraftWorld;
import org.bukkit.craftbukkit.entity.CraftPlayer;

import org.bukkit.Server;
import org.bukkit.World;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerTeleportEvent;
import org.bukkit.plugin.Plugin;

public class TeleportFix implements Listener {
	
	private Server server;
	private Plugin plugin;
	
        // Try increasing this. May be dependent on lag.
	private final int TELEPORT_FIX_DELAY = 15; // ticks
	
	public TeleportFix(Plugin 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
		server.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
			@Override
			public void run() {
				// Refresh nearby clients
				updateEntities(getPlayersWithin(player, visibleDistance));
				
				System.out.println("Applying fix ... " + 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
		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;
	}
}

Hello! This code is not working on Spigot 1.16, do you know If the bug persists on that version or not? If it does, do you have an updated code? Thank you!