diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 5c1448b2b..523096f85 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -278,7 +278,7 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 	/** @var int */
 	protected $spawnThreshold;
 	/** @var int */
-	protected $chunkLoadCount = 0;
+	protected $spawnChunkLoadCount = 0;
 	/** @var int */
 	protected $chunksPerTick;
 
@@ -964,8 +964,6 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 		}
 
 		$this->usedChunks[Level::chunkHash($x, $z)] = true;
-		$this->chunkLoadCount++;
-
 		$this->dataPacket($payload);
 
 		if($this->spawned){
@@ -976,8 +974,9 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 			}
 		}
 
-		if($this->chunkLoadCount >= $this->spawnThreshold and !$this->spawned){
-			$this->doFirstSpawn();
+		if($this->spawnChunkLoadCount !== -1 and ++$this->spawnChunkLoadCount >= $this->spawnThreshold){
+			$this->sendPlayStatus(PlayStatusPacket::PLAYER_SPAWN);
+			$this->spawnChunkLoadCount = -1;
 		}
 	}
 
@@ -1015,11 +1014,12 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 		Timings::$playerChunkSendTimer->stopTiming();
 	}
 
-	protected function doFirstSpawn(){
+	public function doFirstSpawn(){
+		if($this->spawned){
+			return; //avoid player spawning twice (this can only happen on 3.x with a custom malicious client)
+		}
 		$this->spawned = true;
 
-		$this->sendPlayStatus(PlayStatusPacket::PLAYER_SPAWN);
-
 		if($this->hasPermission(Server::BROADCAST_CHANNEL_USERS)){
 			PermissionManager::getInstance()->subscribeToPermission(Server::BROADCAST_CHANNEL_USERS, $this);
 		}
diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index 02bdfba10..e080c8874 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -637,6 +637,9 @@ abstract class Entity extends Location implements Metadatable, EntityIds{
 	 * @param float $value
 	 */
 	public function setScale(float $value) : void{
+		if($value <= 0){
+			throw new \InvalidArgumentException("Scale must be greater than 0");
+		}
 		$multiplier = $value / $this->getScale();
 
 		$this->width *= $multiplier;
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 0f08dc2ad..12807d6a5 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -451,13 +451,14 @@ class Level implements ChunkManager, Metadatable{
 		if(!is_array($pk)){
 			$pk = [$pk];
 		}
-
-		if($players === null){
-			foreach($pk as $e){
-				$this->broadcastPacketToViewers($sound, $e);
+		if(!empty($pk)){
+			if($players === null){
+				foreach($pk as $e){
+					$this->broadcastPacketToViewers($sound, $e);
+				}
+			}else{
+				$this->server->batchPackets($players, $pk, false);
 			}
-		}else{
-			$this->server->batchPackets($players, $pk, false);
 		}
 	}
 
@@ -466,13 +467,14 @@ class Level implements ChunkManager, Metadatable{
 		if(!is_array($pk)){
 			$pk = [$pk];
 		}
-
-		if($players === null){
-			foreach($pk as $e){
-				$this->broadcastPacketToViewers($particle, $e);
+		if(!empty($pk)){
+			if($players === null){
+				foreach($pk as $e){
+					$this->broadcastPacketToViewers($particle, $e);
+				}
+			}else{
+				$this->server->batchPackets($players, $pk, false);
 			}
-		}else{
-			$this->server->batchPackets($players, $pk, false);
 		}
 	}
 
diff --git a/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter.php b/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter.php
index 119bcfc4e..2c65f05ed 100644
--- a/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter.php
+++ b/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter.php
@@ -59,6 +59,7 @@ use pocketmine\network\mcpe\protocol\RequestChunkRadiusPacket;
 use pocketmine\network\mcpe\protocol\ResourcePackChunkRequestPacket;
 use pocketmine\network\mcpe\protocol\ResourcePackClientResponsePacket;
 use pocketmine\network\mcpe\protocol\ServerSettingsRequestPacket;
+use pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket;
 use pocketmine\network\mcpe\protocol\SetPlayerGameTypePacket;
 use pocketmine\network\mcpe\protocol\ShowCreditsPacket;
 use pocketmine\network\mcpe\protocol\SpawnExperienceOrbPacket;
@@ -282,6 +283,11 @@ class PlayerNetworkSessionAdapter extends NetworkSession{
 		return false; //TODO: GUI stuff
 	}
 
+	public function handleSetLocalPlayerAsInitialized(SetLocalPlayerAsInitializedPacket $packet) : bool{
+		$this->player->doFirstSpawn();
+		return true;
+	}
+
 	public function handleLevelSoundEvent(LevelSoundEventPacket $packet) : bool{
 		return $this->player->handleLevelSoundEvent($packet);
 	}