diff --git a/src/pocketmine/block/Block.php b/src/pocketmine/block/Block.php
index faf41bda6..1f5a23514 100644
--- a/src/pocketmine/block/Block.php
+++ b/src/pocketmine/block/Block.php
@@ -44,6 +44,7 @@ use pocketmine\plugin\Plugin;
 use function array_merge;
 use function assert;
 use function dechex;
+use function get_class;
 use const PHP_INT_MAX;
 
 class Block extends Position implements BlockIds, Metadatable{
@@ -324,6 +325,7 @@ class Block extends Position implements BlockIds, Metadatable{
 	 * @param Item $item
 	 *
 	 * @return float
+	 * @throws \InvalidArgumentException if the item efficiency is not a positive number
 	 */
 	public function getBreakTime(Item $item) : float{
 		$base = $this->getHardness();
@@ -335,7 +337,7 @@ class Block extends Position implements BlockIds, Metadatable{
 
 		$efficiency = $item->getMiningEfficiency($this);
 		if($efficiency <= 0){
-			throw new \RuntimeException("Item efficiency is invalid");
+			throw new \InvalidArgumentException(get_class($item) . " has invalid mining efficiency: expected >= 0, got $efficiency");
 		}
 
 		$base /= $efficiency;
diff --git a/src/pocketmine/entity/projectile/SplashPotion.php b/src/pocketmine/entity/projectile/SplashPotion.php
index c718bcecb..2e3427dd9 100644
--- a/src/pocketmine/entity/projectile/SplashPotion.php
+++ b/src/pocketmine/entity/projectile/SplashPotion.php
@@ -89,7 +89,7 @@ class SplashPotion extends Throwable{
 			if(!$this->willLinger()){
 				foreach($this->level->getNearbyEntities($this->boundingBox->expandedCopy(4.125, 2.125, 4.125), $this) as $entity){
 					if($entity instanceof Living and $entity->isAlive()){
-						$distanceSquared = $entity->distanceSquared($this);
+						$distanceSquared = $entity->add(0, $entity->getEyeHeight(), 0)->distanceSquared($this);
 						if($distanceSquared > 16){ //4 blocks
 							continue;
 						}
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index b8acb3777..e17922e4a 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -561,7 +561,10 @@ class Level implements ChunkManager, Metadatable{
 	}
 
 	/**
-	 * Gets the players being used in a specific chunk
+	 * @deprecated WARNING: This function has a misleading name. Contrary to what the name might imply, this function
+	 * DOES NOT return players who are IN a chunk, rather, it returns players who can SEE the chunk.
+	 *
+	 * Returns a list of players who have the target chunk within their view distance.
 	 *
 	 * @param int $chunkX
 	 * @param int $chunkZ
@@ -678,8 +681,7 @@ class Level implements ChunkManager, Metadatable{
 	}
 
 	/**
-	 * WARNING: Do not use this, it's only for internal use.
-	 * Changes to this function won't be recorded on the version.
+	 * @internal
 	 *
 	 * @param Player ...$targets If empty, will send to all players in the level.
 	 */
@@ -699,8 +701,7 @@ class Level implements ChunkManager, Metadatable{
 	}
 
 	/**
-	 * WARNING: Do not use this, it's only for internal use.
-	 * Changes to this function won't be recorded on the version.
+	 * @internal
 	 *
 	 * @param int $currentTick
 	 *
@@ -2262,8 +2263,10 @@ class Level implements ChunkManager, Metadatable{
 		$oldChunk = $this->getChunk($chunkX, $chunkZ, false);
 		if($oldChunk !== null and $oldChunk !== $chunk){
 			if($deleteEntitiesAndTiles){
-				$players = $this->getChunkPlayers($chunkX, $chunkZ);
-				foreach($players as $player){
+				foreach($oldChunk->getEntities() as $player){
+					if(!($player instanceof Player)){
+						continue;
+					}
 					$chunk->addEntity($player);
 					$oldChunk->removeEntity($player);
 					$player->chunk = $chunk;
@@ -2618,6 +2621,7 @@ class Level implements ChunkManager, Metadatable{
 				$loader->onChunkLoaded($chunk);
 			}
 		}else{
+			$this->server->getLogger()->debug("Newly loaded chunk $x $z has no loaders registered, will be unloaded at next available opportunity");
 			$this->unloadChunkRequest($x, $z);
 		}
 
diff --git a/src/pocketmine/network/mcpe/protocol/StartGamePacket.php b/src/pocketmine/network/mcpe/protocol/StartGamePacket.php
index a3b57ccc3..aa09e94f1 100644
--- a/src/pocketmine/network/mcpe/protocol/StartGamePacket.php
+++ b/src/pocketmine/network/mcpe/protocol/StartGamePacket.php
@@ -94,7 +94,9 @@ class StartGamePacket extends DataPacket implements ClientboundPacket{
 	/** @var bool */
 	public $isTexturePacksRequired = true;
 	/** @var array */
-	public $gameRules = []; //TODO: implement this
+	public $gameRules = [ //TODO: implement this
+		"naturalregeneration" => [1, false] //Hack for client side regeneration
+	];
 	/** @var bool */
 	public $hasBonusChestEnabled = false;
 	/** @var bool */