diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index fa8aea85b..e7e924e76 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -392,21 +392,38 @@ abstract class Entity extends Location implements Metadatable{
 	public function setNameTagAlwaysVisible($value = true){
 		$this->setDataFlag(self::DATA_FLAGS, self::DATA_FLAG_ALWAYS_SHOW_NAMETAG, $value);
 	}
-	
+
 	/**
 	 * @return float
 	 */
-	public function getScale(): float{
+	public function getScale() : float{
 		return $this->getDataProperty(self::DATA_SCALE);
 	}
-	
+
 	/**
 	 * @param float $value
 	 */
 	public function setScale(float $value){
+		$multiplier = $value / $this->getScale();
+
+		$this->width *= $multiplier;
+		$this->height *= $multiplier;
+		$halfWidth = $this->width / 2;
+
+		$this->boundingBox->setBounds(
+			$this->x - $halfWidth,
+			$this->y,
+			$this->z - $halfWidth,
+			$this->x + $halfWidth,
+			$this->y + $this->height,
+			$this->z + $halfWidth
+		);
+
 		$this->setDataProperty(self::DATA_SCALE, self::DATA_TYPE_FLOAT, $value);
+		$this->setDataProperty(self::DATA_BOUNDING_BOX_WIDTH, self::DATA_TYPE_FLOAT, $this->width);
+		$this->setDataProperty(self::DATA_BOUNDING_BOX_HEIGHT, self::DATA_TYPE_FLOAT, $this->height);
 	}
-	
+
 	public function isSneaking(){
 		return $this->getDataFlag(self::DATA_FLAGS, self::DATA_FLAG_SNEAKING);
 	}
diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index 7e793d55e..7cc94878c 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -46,12 +46,22 @@ class Item implements ItemIds, \JsonSerializable{
 	private static $cachedParser = null;
 
 	private static function parseCompoundTag(string $tag) : CompoundTag{
+		if(strlen($tag) === 0){
+			throw new \InvalidArgumentException("No NBT data found in supplied string");
+		}
+
 		if(self::$cachedParser === null){
 			self::$cachedParser = new NBT(NBT::LITTLE_ENDIAN);
 		}
 
 		self::$cachedParser->read($tag);
-		return self::$cachedParser->getData();
+		$data = self::$cachedParser->getData();
+
+		if(!($data instanceof CompoundTag)){
+			throw new \InvalidArgumentException("Invalid item NBT string given, it could not be deserialized");
+		}
+
+		return $data;
 	}
 
 	private static function writeCompoundTag(CompoundTag $tag) : string{
diff --git a/src/pocketmine/level/format/Chunk.php b/src/pocketmine/level/format/Chunk.php
index 52684896c..9f47296cf 100644
--- a/src/pocketmine/level/format/Chunk.php
+++ b/src/pocketmine/level/format/Chunk.php
@@ -307,7 +307,7 @@ class Chunk{
 	 * @param int $level 0-15
 	 */
 	public function setBlockSkyLight(int $x, int $y, int $z, int $level){
-		if($this->getSubChunk($y >> 4)->setBlockSkyLight($x, $y & 0x0f, $z, $level)){
+		if($this->getSubChunk($y >> 4, true)->setBlockSkyLight($x, $y & 0x0f, $z, $level)){
 			$this->hasChanged = true;
 		}
 	}
@@ -334,7 +334,7 @@ class Chunk{
 	 * @param int $level 0-15
 	 */
 	public function setBlockLight(int $x, int $y, int $z, int $level){
-		if($this->getSubChunk($y >> 4)->setBlockLight($x, $y & 0x0f, $z, $level)){
+		if($this->getSubChunk($y >> 4, true)->setBlockLight($x, $y & 0x0f, $z, $level)){
 			$this->hasChanged = true;
 		}
 	}
diff --git a/src/pocketmine/level/format/SubChunk.php b/src/pocketmine/level/format/SubChunk.php
index 38cb57194..8a5cc5be6 100644
--- a/src/pocketmine/level/format/SubChunk.php
+++ b/src/pocketmine/level/format/SubChunk.php
@@ -47,8 +47,11 @@ class SubChunk{
 	}
 
 	public function isEmpty() : bool{
-		assert(strlen($this->ids) === 4096, "Wrong length of ID array, expecting 4096 bytes, got " . strlen($this->ids));
-		return substr_count($this->ids, "\x00") === 4096;
+		return (
+			substr_count($this->ids, "\x00") === 4096 and
+			substr_count($this->skyLight, "\xff") === 2048 and
+			substr_count($this->blockLight, "\x00") === 2048
+		);
 	}
 
 	public function getBlockId(int $x, int $y, int $z) : int{
diff --git a/src/pocketmine/nbt/tag/CompoundTag.php b/src/pocketmine/nbt/tag/CompoundTag.php
index 99f384a4e..45ab5bf6d 100644
--- a/src/pocketmine/nbt/tag/CompoundTag.php
+++ b/src/pocketmine/nbt/tag/CompoundTag.php
@@ -111,4 +111,12 @@ class CompoundTag extends NamedTag implements \ArrayAccess{
 		}
 		return $str . "}";
 	}
+
+	public function __clone(){
+		foreach($this as $key => $tag){
+			if($tag instanceof Tag){
+				$this->{$key} = clone $tag;
+			}
+		}
+	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/nbt/tag/ListTag.php b/src/pocketmine/nbt/tag/ListTag.php
index 3fed630be..361db14d6 100644
--- a/src/pocketmine/nbt/tag/ListTag.php
+++ b/src/pocketmine/nbt/tag/ListTag.php
@@ -220,4 +220,12 @@ class ListTag extends NamedTag implements \ArrayAccess, \Countable{
 		}
 		return $str . "}";
 	}
+
+	public function __clone(){
+		foreach($this as $key => $tag){
+			if($tag instanceof Tag){
+				$this->{$key} = clone $tag;
+			}
+		}
+	}
 }
diff --git a/src/pocketmine/resources/pocketmine.yml b/src/pocketmine/resources/pocketmine.yml
index 132890293..8efe10809 100644
--- a/src/pocketmine/resources/pocketmine.yml
+++ b/src/pocketmine/resources/pocketmine.yml
@@ -183,7 +183,7 @@ auto-updater:
 
 timings:
  #Choose the host to use for viewing your timings results.
- host: mcpetimings.com
+ host: timings.pmmp.io
 
 console:
  #Choose whether to enable server stats reporting on the console title.