diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 8058cb3e4..85265c25a 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -794,10 +794,12 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 	 * @return boolean
 	 */
 	public function sleepOn(Vector3 $pos){
-		foreach($this->level->getPlayers() as $p){
-			if($p->sleeping instanceof Vector3){
-				if($pos->distance($p->sleeping) <= 0.1){
-					return false;
+		foreach($this->level->getNearbyEntities($this->boundingBox->grow(2, 1, 2), $this) as $p){
+			if($p instanceof Player){
+				if($p->sleeping instanceof Vector3){
+					if($pos->distance($p->sleeping) <= 0.1){
+						return false;
+					}
 				}
 			}
 		}
@@ -1150,6 +1152,7 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 			$pk->teleport = true;
 			$this->directDataPacket($pk);
 			$this->forceMovement = new Vector3($from->x, $from->y, $from->z);
+			$this->newPosition = null;
 		}else{
 			$this->forceMovement = null;
 			if($this->nextChunkOrderRun > 20){
@@ -2273,10 +2276,13 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 				}
 			}
 
+			foreach($this->windowIndex as $window){
+				$this->removeWindow($window);
+			}
+
 			$this->interface->close($this, $reason);
 			$this->level->freeAllChunks($this);
 
-
 			parent::close();
 
 			$this->loggedIn = false;
@@ -2284,6 +2290,7 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 			if(isset($ev) and $this->username != "" and $this->spawned !== false and $ev->getQuitMessage() != ""){
 				$this->server->broadcastMessage($ev->getQuitMessage());
 			}
+
 			$this->server->getPluginManager()->unsubscribeFromPermission(Server::BROADCAST_CHANNEL_USERS, $this);
 			$this->spawned = false;
 			$this->server->getLogger()->info(TextFormat::AQUA . $this->username . TextFormat::WHITE . "[/" . $this->ip . ":" . $this->port . "] logged out due to " . str_replace(["\n", "\r"], [" ", ""], $reason));
@@ -2291,6 +2298,7 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 			$this->windowIndex = [];
 			$this->usedChunks = [];
 			$this->loadQueue = [];
+			$this->spawnPosition = null;
 			unset($this->buffer);
 		}
 
@@ -2513,6 +2521,14 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 
 	public function teleport(Vector3 $pos, $yaw = null, $pitch = null){
 		if(parent::teleport($pos, $yaw, $pitch)){
+
+			foreach($this->windowIndex as $window){
+				if($window === $this->inventory){
+					continue;
+				}
+				$this->removeWindow($window);
+			}
+
 			$this->airTicks = 300;
 			$this->fallDistance = 0;
 			$this->orderChunks();
diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index 26fc04d52..1e3272ab3 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -643,7 +643,7 @@ class Server{
 		$result = $this->getPlayerExact($name);
 
 		if($result === null){
-			$result = new OfflinePlayer($this, $name);
+			return new OfflinePlayer($this, $name);
 		}
 
 		return $result;
@@ -1083,7 +1083,7 @@ class Server{
 			return false;
 		}
 
-		$seed = $seed === null ? Binary::readInt(Utils::getRandomBytes(4, false)) : (int) $seed;
+		$seed = $seed === null ? Binary::readInt(@Utils::getRandomBytes(4, false)) : (int) $seed;
 
 		if($generator !== null and class_exists($generator) and is_subclass_of($generator, Generator::class)){
 			$generator = new $generator($options);
@@ -1488,7 +1488,7 @@ class Server{
 			"level-type" => "DEFAULT",
 			"enable-query" => true,
 			"enable-rcon" => false,
-			"rcon.password" => substr(base64_encode(Utils::getRandomBytes(20, false)), 3, 10),
+			"rcon.password" => substr(base64_encode(@Utils::getRandomBytes(20, false)), 3, 10),
 			"auto-save" => true,
 		]);
 
@@ -1534,7 +1534,7 @@ class Server{
 		}
 
 		$this->logger->info("Starting Minecraft PE server on " . ($this->getIp() === "" ? "*" : $this->getIp()) . ":" . $this->getPort());
-		define("BOOTUP_RANDOM", Utils::getRandomBytes(16));
+		define("BOOTUP_RANDOM", @Utils::getRandomBytes(16));
 		$this->serverID = Binary::readLong(substr(Utils::getUniqueID(true, $this->getIp() . $this->getPort()), 0, 8));
 
 		$this->addInterface($this->mainInterface = new RakLibInterface($this));
diff --git a/src/pocketmine/block/TNT.php b/src/pocketmine/block/TNT.php
index 76a2bd3f2..5dc758ac9 100644
--- a/src/pocketmine/block/TNT.php
+++ b/src/pocketmine/block/TNT.php
@@ -41,7 +41,7 @@ class TNT extends Solid{
 	public function onActivate(Item $item, Player $player = null){
 		if($item->getID() === Item::FLINT_STEEL){
 			$item->useOn($this);
-			$this->getLevel()->setBlock($this, new Air(), false, false, true);
+			$this->getLevel()->setBlock($this, new Air(), true);
 
 			$mot = (new Random())->nextSignedFloat() * M_PI * 2;
 			$tnt = new PrimedTNT($this->getLevel()->getChunk($this->x >> 4, $this->z >> 4), new Compound("", [
diff --git a/src/pocketmine/entity/Arrow.php b/src/pocketmine/entity/Arrow.php
index e43109707..5a010f211 100644
--- a/src/pocketmine/entity/Arrow.php
+++ b/src/pocketmine/entity/Arrow.php
@@ -85,7 +85,7 @@ class Arrow extends Projectile{
 
 			$this->motionY -= $this->gravity;
 
-			$this->inBlock = $this->checkObstruction($this->x, ($this->boundingBox->minY + $this->boundingBox->maxY) / 2, $this->z);
+			$this->keepMovement = $this->checkObstruction($this->x, ($this->boundingBox->minY + $this->boundingBox->maxY) / 2, $this->z);
 
 			$moveVector = new Vector3($this->x + $this->motionX, $this->y + $this->motionY, $this->z + $this->motionZ);
 
diff --git a/src/pocketmine/entity/DroppedItem.php b/src/pocketmine/entity/DroppedItem.php
index 0f8367a36..79d5b5ae8 100644
--- a/src/pocketmine/entity/DroppedItem.php
+++ b/src/pocketmine/entity/DroppedItem.php
@@ -93,7 +93,7 @@ class DroppedItem extends Entity{
 
 			$this->motionY -= $this->gravity;
 
-			$this->inBlock = $this->checkObstruction($this->x, ($this->boundingBox->minY + $this->boundingBox->maxY) / 2, $this->z);
+			$this->keepMovement = $this->checkObstruction($this->x, ($this->boundingBox->minY + $this->boundingBox->maxY) / 2, $this->z);
 			$this->move($this->motionX, $this->motionY, $this->motionZ);
 
 			$friction = 1 - $this->drag;
@@ -126,7 +126,7 @@ class DroppedItem extends Entity{
 
 		$this->timings->stopTiming();
 
-		return $hasUpdate or !$this->onGround or ($this->motionX == 0 and $this->motionY == 0 and $this->motionZ == 0);
+		return $hasUpdate or !$this->onGround or $this->motionX != 0 or $this->motionY != 0 or $this->motionZ != 0;
 	}
 
 	public function attack($damage, $source = EntityDamageEvent::CAUSE_MAGIC){
diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index ebf1bd73a..80209d80c 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -122,7 +122,7 @@ abstract class Entity extends Location implements Metadatable{
 
 	protected $ySize = 0;
 	protected $stepHeight = 0;
-	public $keepMovement = true;
+	public $keepMovement = false;
 
 	public $fallDistance;
 	public $ticksLived;
@@ -777,12 +777,11 @@ abstract class Entity extends Location implements Metadatable{
 			return true;
 		}
 
-		//if($this->inBlock){ //TODO: noclip
-		//	$this->boundingBox->offset($dx, $dy, $dz);
-		//	$this->x = ($this->boundingBox->minX + $this->boundingBox->maxX) / 2;
-		//	$this->y = $this->boundingBox->minY/* + $this->height*/;
-		//	$this->z = ($this->boundingBox->minZ + $this->boundingBox->maxZ) / 2;
-		//}else{
+		if($this->keepMovement){
+			$this->boundingBox->offset($dx, $dy, $dz);
+			$pos = new Vector3(($this->boundingBox->minX + $this->boundingBox->maxX) / 2, $this->boundingBox->minY - $this->ySize, ($this->boundingBox->minZ + $this->boundingBox->maxZ) / 2);
+			$this->setPosition($pos);
+		}else{
 
 			Timings::$entityMoveTimer->startTiming();
 
@@ -841,7 +840,7 @@ abstract class Entity extends Location implements Metadatable{
 
 			$this->boundingBox->offset(0, $dy, 0);
 
-			if(!$this->keepMovement and $movY != $dy){
+			if($movY != $dy){
 				$dx = 0;
 				$dy = 0;
 				$dz = 0;
@@ -855,7 +854,7 @@ abstract class Entity extends Location implements Metadatable{
 
 			$this->boundingBox->offset($dx, 0, 0);
 
-			if(!$this->keepMovement and $movX != $dx){
+			if($movX != $dx){
 				$dx = 0;
 				$dy = 0;
 				$dz = 0;
@@ -867,7 +866,7 @@ abstract class Entity extends Location implements Metadatable{
 
 			$this->boundingBox->offset(0, 0, $dz);
 
-			if(!$this->keepMovement and $movZ != $dz){
+			if($movZ != $dz){
 				$dx = 0;
 				$dy = 0;
 				$dz = 0;
@@ -893,7 +892,7 @@ abstract class Entity extends Location implements Metadatable{
 				}
 
 				$this->boundingBox->offset(0, $dy, 0);
-				if(!$this->keepMovement and $movY != $dy){
+				if($movY != $dy){
 					$dx = 0;
 					$dy = 0;
 					$dz = 0;
@@ -904,7 +903,7 @@ abstract class Entity extends Location implements Metadatable{
 				}
 
 				$this->boundingBox->offset($dx, 0, 0);
-				if(!$this->keepMovement and $movX != $dx){
+				if($movX != $dx){
 					$dx = 0;
 					$dy = 0;
 					$dz = 0;
@@ -915,13 +914,13 @@ abstract class Entity extends Location implements Metadatable{
 				}
 
 				$this->boundingBox->offset(0, 0, $dz);
-				if(!$this->keepMovement and $movZ != $dz){
+				if($movZ != $dz){
 					$dx = 0;
 					$dy = 0;
 					$dz = 0;
 				}
 
-				if(!$this->keepMovement and $movY != $dy){
+				if($movY != $dy){
 					$dx = 0;
 					$dy = 0;
 					$dz = 0;
@@ -956,16 +955,14 @@ abstract class Entity extends Location implements Metadatable{
 			}else{
 
 				if($this instanceof Player){
-					if(($this->onGround and $movY != 0) or (!$this->onGround and $movY < 0)){
+					if(!$this->onGround or $movY != 0){
 						$bb = clone $this->boundingBox;
-						$bb->maxY = $bb->minY + 0.5;
+						$bb->maxY = $bb->minY + 1;
 						if(count($this->level->getCollisionBlocks($bb->expand(0.01, 0.01, 0.01))) > 0){
-							$isColliding = true;
+							$this->onGround = true;
 						}else{
-							$isColliding = false;
+							$this->onGround = false;
 						}
-
-						$this->onGround = ($movY <= 0 and $isColliding);
 					}
 				}else{
 					$this->onGround = ($movY != $dy and $movY < 0);
@@ -990,7 +987,7 @@ abstract class Entity extends Location implements Metadatable{
 			Timings::$entityMoveTimer->stopTiming();
 
 			return $result;
-		//}
+		}
 	}
 
 	protected function checkBlockCollision(){
@@ -1185,10 +1182,11 @@ abstract class Entity extends Location implements Metadatable{
 			if($this->chunk instanceof FullChunk){
 				$this->chunk->removeEntity($this);
 			}
-			if(($level = $this->level) instanceof Level){
-				$level->removeEntity($this);
+			if($this->level instanceof Level){
+				$this->level->removeEntity($this);
 			}
 			$this->despawnFromAll();
+			$this->level = null;
 		}
 	}
 
diff --git a/src/pocketmine/entity/Human.php b/src/pocketmine/entity/Human.php
index a23e8e46e..8393dbb41 100644
--- a/src/pocketmine/entity/Human.php
+++ b/src/pocketmine/entity/Human.php
@@ -226,4 +226,14 @@ class Human extends Creature implements ProjectileSource, InventoryHolder{
 		return $d;
 	}
 
+	public function close(){
+		if(!$this->closed){
+			foreach($this->getInventory()->getViewers() as $player){
+				$this->getInventory()->close($player);
+			}
+			$this->inventory = null;
+			parent::close();
+		}
+	}
+
 }
diff --git a/src/pocketmine/inventory/ChestInventory.php b/src/pocketmine/inventory/ChestInventory.php
index acd04533b..5ed416101 100644
--- a/src/pocketmine/inventory/ChestInventory.php
+++ b/src/pocketmine/inventory/ChestInventory.php
@@ -21,6 +21,7 @@
 
 namespace pocketmine\inventory;
 
+use pocketmine\level\Level;
 use pocketmine\network\protocol\TileEventPacket;
 use pocketmine\Player;
 use pocketmine\Server;
@@ -48,7 +49,9 @@ class ChestInventory extends ContainerInventory{
 			$pk->z = $this->getHolder()->getZ();
 			$pk->case1 = 1;
 			$pk->case2 = 2;
-			Server::broadcastPacket($this->getHolder()->getLevel()->getPlayers(), $pk);
+			if(($level = $this->getHolder()->getLevel()) instanceof Level){
+				Server::broadcastPacket($level->getUsingChunk($this->getHolder()->getX() >> 4, $this->getHolder()->getZ() >> 4), $pk);
+			}
 		}
 	}
 
@@ -60,7 +63,9 @@ class ChestInventory extends ContainerInventory{
 			$pk->z = $this->getHolder()->getZ();
 			$pk->case1 = 1;
 			$pk->case2 = 0;
-			Server::broadcastPacket($this->getHolder()->getLevel()->getPlayers(), $pk);
+			if(($level = $this->getHolder()->getLevel()) instanceof Level){
+				Server::broadcastPacket($level->getUsingChunk($this->getHolder()->getX() >> 4, $this->getHolder()->getZ() >> 4), $pk);
+			}
 		}
 		parent::onClose($who);
 	}
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 24679a93c..309c3e40e 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -304,11 +304,20 @@ class Level implements ChunkManager, Metadatable{
 	}
 
 	public function close(){
+
 		if($this->getAutoSave()){
 			$this->save();
 		}
-		$this->unloadChunks();
+
+		foreach($this->chunks as $chunk){
+			$this->unloadChunk($chunk->getX(), $chunk->getZ(), false);
+		}
+
+		$this->server->getGenerationManager()->closeLevel($this);
 		$this->provider->close();
+		$this->provider = null;
+		$this->blockMetadata = null;
+		$this->blockCache = [];
 	}
 
 	/**
@@ -355,11 +364,13 @@ class Level implements ChunkManager, Metadatable{
 				$player->teleport($this->server->getDefaultLevel()->getSafeSpawn());
 			}
 		}
-		$this->close();
+
 		if($this === $defaultLevel){
 			$this->server->setDefaultLevel(null);
 		}
 
+		$this->close();
+
 		return true;
 	}
 
@@ -1094,7 +1105,7 @@ class Level implements ChunkManager, Metadatable{
 			}
 		}
 
-		if(!($player instanceof Player) or ($player->getGamemode() & 0x01) === 0){
+		if(!($player instanceof Player) or $player->isSurvival()){
 			foreach($drops as $drop){
 				if($drop[2] > 0){
 					$this->dropItem($vector->add(0.5, 0.5, 0.5), Item::get(...$drop));
@@ -2071,18 +2082,18 @@ class Level implements ChunkManager, Metadatable{
 	}
 
 	public function setMetadata($metadataKey, MetadataValue $metadataValue){
-		$this->server->getPlayerMetadata()->setMetadata($this, $metadataKey, $metadataValue);
+		$this->server->getLevelMetadata()->setMetadata($this, $metadataKey, $metadataValue);
 	}
 
 	public function getMetadata($metadataKey){
-		return $this->server->getPlayerMetadata()->getMetadata($this, $metadataKey);
+		return $this->server->getLevelMetadata()->getMetadata($this, $metadataKey);
 	}
 
 	public function hasMetadata($metadataKey){
-		return $this->server->getPlayerMetadata()->hasMetadata($this, $metadataKey);
+		return $this->server->getLevelMetadata()->hasMetadata($this, $metadataKey);
 	}
 
 	public function removeMetadata($metadataKey, Plugin $plugin){
-		$this->server->getPlayerMetadata()->removeMetadata($this, $metadataKey, $plugin);
+		$this->server->getLevelMetadata()->removeMetadata($this, $metadataKey, $plugin);
 	}
 }
diff --git a/src/pocketmine/level/format/generic/BaseFullChunk.php b/src/pocketmine/level/format/generic/BaseFullChunk.php
index b17bd465e..f4b674294 100644
--- a/src/pocketmine/level/format/generic/BaseFullChunk.php
+++ b/src/pocketmine/level/format/generic/BaseFullChunk.php
@@ -294,6 +294,7 @@ abstract class BaseFullChunk implements FullChunk{
 		foreach($this->getTiles() as $tile){
 			$tile->close();
 		}
+		$this->provider = null;
 		return true;
 	}
 
diff --git a/src/pocketmine/level/format/mcregion/McRegion.php b/src/pocketmine/level/format/mcregion/McRegion.php
index ec700a056..4b6f5c09f 100644
--- a/src/pocketmine/level/format/mcregion/McRegion.php
+++ b/src/pocketmine/level/format/mcregion/McRegion.php
@@ -191,9 +191,7 @@ class McRegion extends BaseLevelProvider{
 	public function unloadChunk($x, $z, $safe = true){
 		$chunk = $this->getChunk($x, $z, false);
 		if($chunk instanceof FullChunk and $chunk->unload(false, $safe)){
-			$this->chunks[$index = Level::chunkHash($x, $z)] = null;
-
-			unset($this->chunks[$index]);
+			unset($this->chunks[Level::chunkHash($x, $z)]);
 		}
 
 		return true;
@@ -299,5 +297,6 @@ class McRegion extends BaseLevelProvider{
 			$region->close();
 			unset($this->regions[$index]);
 		}
+		$this->level = null;
 	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/level/format/mcregion/RegionLoader.php b/src/pocketmine/level/format/mcregion/RegionLoader.php
index d6c4159f1..64a0eb13d 100644
--- a/src/pocketmine/level/format/mcregion/RegionLoader.php
+++ b/src/pocketmine/level/format/mcregion/RegionLoader.php
@@ -198,6 +198,7 @@ class RegionLoader{
 	public function close(){
 		$this->writeLocationTable();
 		fclose($this->filePointer);
+		$this->levelProvider = null;
 	}
 
 	public function doSlowCleanUp(){
diff --git a/src/pocketmine/network/query/QueryHandler.php b/src/pocketmine/network/query/QueryHandler.php
index 155e6c1a9..750f5e0ca 100644
--- a/src/pocketmine/network/query/QueryHandler.php
+++ b/src/pocketmine/network/query/QueryHandler.php
@@ -66,7 +66,7 @@ class QueryHandler{
 
 	public function regenerateToken(){
 		$this->lastToken = $this->token;
-		$this->token = Utils::getRandomBytes(16, false);
+		$this->token = @Utils::getRandomBytes(16, false);
 	}
 
 	public static function getTokenString($token, $salt){
diff --git a/src/pocketmine/tile/Tile.php b/src/pocketmine/tile/Tile.php
index 4e735e488..2444e6b33 100644
--- a/src/pocketmine/tile/Tile.php
+++ b/src/pocketmine/tile/Tile.php
@@ -121,6 +121,7 @@ abstract class Tile extends Position{
 			if(($level = $this->getLevel()) instanceof Level){
 				$level->removeTile($this);
 			}
+			$this->level = null;
 		}
 	}
 
diff --git a/src/pocketmine/wizard/Installer.php b/src/pocketmine/wizard/Installer.php
index 7842eb946..b9c10cab3 100644
--- a/src/pocketmine/wizard/Installer.php
+++ b/src/pocketmine/wizard/Installer.php
@@ -175,7 +175,7 @@ LICENSE;
 		echo "[?] " . $this->lang->rcon_enable . " (y/N): ";
 		if(strtolower($this->getInput("n")) === "y"){
 			$config->set("enable-rcon", true);
-			$password = substr(base64_encode(Utils::getRandomBytes(20, false)), 3, 10);
+			$password = substr(base64_encode(@Utils::getRandomBytes(20, false)), 3, 10);
 			$config->set("rcon.password", $password);
 			echo "[*] " . $this->lang->rcon_password . ": " . $password . "\n";
 		}else{