diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 7b03369dd..25a4664ed 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -158,6 +158,7 @@ use function min;
 use function preg_match;
 use function round;
 use function spl_object_id;
+use function sqrt;
 use function strlen;
 use function strpos;
 use function strtolower;
@@ -411,8 +412,11 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 	}
 
 	public function setFlying(bool $value){
-		$this->flying = $value;
-		$this->sendSettings();
+		if($this->flying !== $value){
+			$this->flying = $value;
+			$this->resetFallDistance();
+			$this->sendSettings();
+		}
 	}
 
 	public function isFlying() : bool{
@@ -1332,20 +1336,18 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 
 		$this->allowFlight = $this->isCreative();
 		if($this->isSpectator()){
-			$this->flying = true;
+			$this->setFlying(true);
 			$this->keepMovement = true;
 			$this->despawnFromAll();
 		}else{
 			$this->keepMovement = $this->allowMovementCheats;
 			if($this->isSurvival()){
-				$this->flying = false;
+				$this->setFlying(false);
 			}
 			$this->spawnToAll();
 		}
 
-		$this->resetFallDistance();
-
-		if(!$client){ //GameMode changed by server, do not send for client changes
+		if(!$client){ //Gamemode changed by server, do not send for client changes
 			$this->sendGamemode();
 		}else{
 			Command::broadcastCommandMessage($this, new TranslationContainer("commands.gamemode.success.self", [GameMode::toTranslation($gm)]));
@@ -1564,7 +1566,7 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 				}else{
 					$this->broadcastMovement();
 
-					$distance = $from->distance($to);
+					$distance = sqrt((($from->x - $to->x) ** 2) + (($from->z - $to->z) ** 2));
 					//TODO: check swimming (adds 0.015 exhaustion in MCPE)
 					if($this->isSprinting()){
 						$this->exhaust(0.1 * $distance, PlayerExhaustEvent::CAUSE_SPRINTING);
@@ -1589,6 +1591,12 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 		$this->newPosition = null;
 	}
 
+	public function fall(float $fallDistance) : void{
+		if(!$this->flying){
+			parent::fall($fallDistance);
+		}
+	}
+
 	public function jump() : void{
 		(new PlayerJumpEvent($this))->call();
 		parent::jump();
@@ -2398,8 +2406,9 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 		$ev->call();
 		if($ev->isCancelled()){
 			$this->sendSettings();
-		}else{
-			$this->setFlying($fly);
+		}else{ //don't use setFlying() here, to avoid feedback loops
+			$this->flying = $fly;
+			$this->resetFallDistance();
 		}
 	}
 
diff --git a/src/pocketmine/block/Crops.php b/src/pocketmine/block/Crops.php
index 516c1697c..c56c678b2 100644
--- a/src/pocketmine/block/Crops.php
+++ b/src/pocketmine/block/Crops.php
@@ -61,7 +61,7 @@ abstract class Crops extends Flowable{
 
 
 	public function onActivate(Item $item, Player $player = null) : bool{
-		if($item->getId() === Item::DYE and $item->getDamage() === 0x0F){ //Bonemeal
+		if($this->age < 7 and $item->getId() === Item::DYE and $item->getDamage() === 0x0F){ //Bonemeal
 			$block = clone $this;
 			$block->age += mt_rand(2, 5);
 			if($block->age > 7){
diff --git a/src/pocketmine/level/Explosion.php b/src/pocketmine/level/Explosion.php
index 540b4e0fe..5251ee366 100644
--- a/src/pocketmine/level/Explosion.php
+++ b/src/pocketmine/level/Explosion.php
@@ -220,11 +220,10 @@ class Explosion{
 
 			$t = $this->level->getTileAt($block->x, $block->y, $block->z);
 			if($t instanceof Tile){
+				if($t instanceof Chest){
+					$t->unpair();
+				}
 				if($yieldDrops and $t instanceof Container){
-					if($t instanceof Chest){
-						$t->unpair();
-					}
-
 					$t->getInventory()->dropContents($this->level, $t->add(0.5, 0.5, 0.5));
 				}
 
diff --git a/src/pocketmine/wizard/SetupWizard.php b/src/pocketmine/wizard/SetupWizard.php
index 149570053..464066994 100644
--- a/src/pocketmine/wizard/SetupWizard.php
+++ b/src/pocketmine/wizard/SetupWizard.php
@@ -75,10 +75,6 @@ class SetupWizard{
 			}
 		}while($lang === null);
 
-		$config = new Config(\pocketmine\DATA . "server.properties", Config::PROPERTIES);
-		$config->set("language", $lang);
-		$config->save();
-
 		$this->lang = new Language($lang);
 
 		$this->message($this->lang->get("language_has_been_selected"));
@@ -87,6 +83,11 @@ class SetupWizard{
 			return false;
 		}
 
+		//this has to happen here to prevent user avoiding agreeing to license
+		$config = new Config(\pocketmine\DATA . "server.properties", Config::PROPERTIES);
+		$config->set("language", $lang);
+		$config->save();
+
 		if(strtolower($this->getInput($this->lang->get("skip_installer"), "n", "y/N")) === "y"){
 			return true;
 		}