diff --git a/src/pocketmine/OfflinePlayer.php b/src/pocketmine/OfflinePlayer.php
index 0b7af091a..e14e1a544 100644
--- a/src/pocketmine/OfflinePlayer.php
+++ b/src/pocketmine/OfflinePlayer.php
@@ -108,11 +108,11 @@ class OfflinePlayer implements IPlayer, Metadatable{
 	}
 
 	public function getFirstPlayed(){
-		return $this->namedtag instanceof CompoundTag ? $this->namedtag["firstPlayed"] : null;
+		return $this->namedtag instanceof CompoundTag ? $this->namedtag->getLong("firstPlayed", 0, true) : null;
 	}
 
 	public function getLastPlayed(){
-		return $this->namedtag instanceof CompoundTag ? $this->namedtag["lastPlayed"] : null;
+		return $this->namedtag instanceof CompoundTag ? $this->namedtag->getLong("lastPlayed", 0, true) : null;
 	}
 
 	public function hasPlayedBefore() : bool{
diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 1016bdada..6239b268c 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -95,6 +95,7 @@ use pocketmine\metadata\MetadataValue;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
+use pocketmine\nbt\tag\ListTag;
 use pocketmine\network\mcpe\PlayerNetworkSessionAdapter;
 use pocketmine\network\mcpe\protocol\AdventureSettingsPacket;
 use pocketmine\network\mcpe\protocol\AnimatePacket;
@@ -392,11 +393,11 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 	}
 
 	public function getFirstPlayed(){
-		return $this->namedtag instanceof CompoundTag ? $this->namedtag["firstPlayed"] : null;
+		return $this->namedtag instanceof CompoundTag ? $this->namedtag->getLong("firstPlayed", 0, true) : null;
 	}
 
 	public function getLastPlayed(){
-		return $this->namedtag instanceof CompoundTag ? $this->namedtag["lastPlayed"] : null;
+		return $this->namedtag instanceof CompoundTag ? $this->namedtag->getLong("lastPlayed", 0, true) : null;
 	}
 
 	public function hasPlayedBefore() : bool{
@@ -1816,7 +1817,7 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 
 		$this->namedtag = $this->server->getOfflinePlayerData($this->username);
 
-		$this->playedBefore = ($this->namedtag["lastPlayed"] - $this->namedtag["firstPlayed"]) > 1; // microtime(true) - microtime(true) may have less than one millisecond difference
+		$this->playedBefore = ($this->getLastPlayed() - $this->getFirstPlayed()) > 1; // microtime(true) - microtime(true) may have less than one millisecond difference
 		$this->namedtag->setString("NameTag", $this->username);
 
 		$this->gamemode = $this->namedtag->getInt("playerGameType", self::SURVIVAL) & 0x03;
@@ -1827,12 +1828,14 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 
 		$this->allowFlight = $this->isCreative();
 
-		if(($level = $this->server->getLevelByName((string) $this->namedtag["Level"])) === null){
+		if(($level = $this->server->getLevelByName($this->namedtag->getString("Level", "", true))) === null){
 			$this->setLevel($this->server->getDefaultLevel());
-			$this->namedtag["Level"] = $this->level->getName();
-			$this->namedtag["Pos"][0] = $this->level->getSpawnLocation()->x;
-			$this->namedtag["Pos"][1] = $this->level->getSpawnLocation()->y;
-			$this->namedtag["Pos"][2] = $this->level->getSpawnLocation()->z;
+			$this->namedtag->setString("Level", $this->level->getName());
+			$this->namedtag->setTag(new ListTag("Pos", [
+				$this->level->getSpawnLocation()->x,
+				$this->level->getSpawnLocation()->y,
+				$this->level->getSpawnLocation()->z
+			 ]));
 		}else{
 			$this->setLevel($level);
 		}
diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index bf305e40d..ce06387b1 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -496,15 +496,16 @@ abstract class Entity extends Location implements Metadatable, EntityIds{
 		$this->id = Entity::$entityCount++;
 		$this->namedtag = $nbt;
 
-		$this->chunk = $level->getChunk($this->namedtag["Pos"][0] >> 4, $this->namedtag["Pos"][2] >> 4, true);
+		/** @var float[] $pos */
+		$pos = $this->namedtag->getListTag("Pos")->getAllValues();
+
+		$this->chunk = $level->getChunk(((int) $pos[0]) >> 4, ((int) $pos[2]) >> 4, true);
 		assert($this->chunk !== null);
 		$this->setLevel($level);
 		$this->server = $level->getServer();
 
 		$this->boundingBox = new AxisAlignedBB(0, 0, 0, 0, 0, 0);
 
-		/** @var float[] $pos */
-		$pos = $this->namedtag->getListTag("Pos")->getAllValues();
 		/** @var float[] $rotation */
 		$rotation = $this->namedtag->getListTag("Rotation")->getAllValues();
 
diff --git a/src/pocketmine/entity/Item.php b/src/pocketmine/entity/Item.php
index a2acddac0..c8174897a 100644
--- a/src/pocketmine/entity/Item.php
+++ b/src/pocketmine/entity/Item.php
@@ -57,7 +57,7 @@ class Item extends Entity{
 		parent::initEntity();
 
 		$this->setMaxHealth(5);
-		$this->setHealth((int) $this->namedtag["Health"]);
+		$this->setHealth($this->namedtag->getShort("Health", (int) $this->getHealth()));
 		$this->age = $this->namedtag->getShort("Age", $this->age);
 		$this->pickupDelay = $this->namedtag->getShort("PickupDelay", $this->pickupDelay);
 		$this->owner = $this->namedtag->getString("Owner", $this->owner);
diff --git a/src/pocketmine/entity/Living.php b/src/pocketmine/entity/Living.php
index af30d026a..f7255d1f2 100644
--- a/src/pocketmine/entity/Living.php
+++ b/src/pocketmine/entity/Living.php
@@ -68,7 +68,7 @@ abstract class Living extends Entity implements Damageable{
 		$health = $this->getMaxHealth();
 
 		if($this->namedtag->hasTag("HealF", FloatTag::class)){
-			$health = new FloatTag("Health", (float) $this->namedtag["HealF"]);
+			$health = new FloatTag("Health", $this->namedtag->getFloat("HealF"));
 			$this->namedtag->removeTag("HealF");
 		}elseif($this->namedtag->hasTag("Health")){
 			$healthTag = $this->namedtag->getTag("Health");