diff --git a/src/pocketmine/network/mcpe/ChunkRequestTask.php b/src/pocketmine/network/mcpe/ChunkRequestTask.php
index fe9a77a4ec..c1f04986c2 100644
--- a/src/pocketmine/network/mcpe/ChunkRequestTask.php
+++ b/src/pocketmine/network/mcpe/ChunkRequestTask.php
@@ -26,6 +26,7 @@ namespace pocketmine\network\mcpe;
 use pocketmine\network\mcpe\protocol\FullChunkDataPacket;
 use pocketmine\scheduler\AsyncTask;
 use pocketmine\world\format\Chunk;
+use pocketmine\world\format\io\FastChunkSerializer;
 
 class ChunkRequestTask extends AsyncTask{
 	private const TLS_KEY_PROMISE = "promise";
@@ -40,19 +41,24 @@ class ChunkRequestTask extends AsyncTask{
 
 	protected $compressionLevel;
 
+	/** @var string */
+	private $tiles = "";
+
 	public function __construct(int $chunkX, int $chunkZ, Chunk $chunk, CompressBatchPromise $promise, ?\Closure $onError = null){
 		$this->compressionLevel = NetworkCompression::$LEVEL;
 
-		$this->chunk = ChunkSerializer::serialize($chunk);
+		$this->chunk = FastChunkSerializer::serialize($chunk);
 		$this->chunkX = $chunkX;
 		$this->chunkZ = $chunkZ;
+		$this->tiles = ChunkSerializer::serializeTiles($chunk);
 
 		$this->storeLocal(self::TLS_KEY_PROMISE, $promise);
 		$this->storeLocal(self::TLS_KEY_ERROR_HOOK, $onError);
 	}
 
 	public function onRun() : void{
-		$this->setResult(NetworkCompression::compress(PacketBatch::fromPackets(FullChunkDataPacket::create($this->chunkX, $this->chunkZ, $this->chunk))->getBuffer(), $this->compressionLevel));
+		$chunk = ChunkSerializer::serialize(FastChunkSerializer::deserialize($this->chunk), $this->tiles);
+		$this->setResult(NetworkCompression::compress(PacketBatch::fromPackets(FullChunkDataPacket::create($this->chunkX, $this->chunkZ, $chunk))->getBuffer(), $this->compressionLevel));
 	}
 
 	public function onError() : void{
diff --git a/src/pocketmine/network/mcpe/ChunkSerializer.php b/src/pocketmine/network/mcpe/ChunkSerializer.php
index 0939504eb0..b8f702285d 100644
--- a/src/pocketmine/network/mcpe/ChunkSerializer.php
+++ b/src/pocketmine/network/mcpe/ChunkSerializer.php
@@ -25,6 +25,7 @@ namespace pocketmine\network\mcpe;
 
 use pocketmine\block\tile\Spawnable;
 use pocketmine\network\mcpe\protocol\types\RuntimeBlockMapping;
+use pocketmine\utils\BinaryStream;
 use pocketmine\world\format\Chunk;
 use function count;
 use function pack;
@@ -36,11 +37,13 @@ final class ChunkSerializer{
 	}
 
 	/**
-	 * @param Chunk $chunk
+	 * @param Chunk       $chunk
+	 *
+	 * @param string|null $tiles
 	 *
 	 * @return string
 	 */
-	public static function serialize(Chunk $chunk) : string{
+	public static function serialize(Chunk $chunk, ?string $tiles = null) : string{
 		$stream = new NetworkBinaryStream();
 		$subChunkCount = $chunk->getSubChunkSendCount();
 		$stream->putByte($subChunkCount);
@@ -66,6 +69,16 @@ final class ChunkSerializer{
 		$stream->putByte(0); //border block array count
 		//Border block entry format: 1 byte (4 bits X, 4 bits Z). These are however useless since they crash the regular client.
 
+		if($tiles !== null){
+			$stream->put($tiles);
+		}else{
+			$stream->put(self::serializeTiles($chunk));
+		}
+		return $stream->getBuffer();
+	}
+
+	public static function serializeTiles(Chunk $chunk) : string{
+		$stream = new BinaryStream();
 		foreach($chunk->getTiles() as $tile){
 			if($tile instanceof Spawnable){
 				$stream->put($tile->getSerializedSpawnCompound());