From 2d3562c68763d1bfe3dc765728b22a64fb551437 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Mon, 29 Jul 2019 17:17:05 +0100
Subject: [PATCH] World: fixed scheduled updates causing chunk loading

this probably needs to be backported.
---
 src/pocketmine/level/Level.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 754312852..9736c142c 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -820,7 +820,12 @@ class Level implements ChunkManager, Metadatable{
 
 		//Delayed updates
 		while($this->scheduledBlockUpdateQueue->count() > 0 and $this->scheduledBlockUpdateQueue->current()["priority"] <= $currentTick){
-			$block = $this->getBlock($this->scheduledBlockUpdateQueue->extract()["data"]);
+			/** @var Vector3 $vec */
+			$vec = $this->scheduledBlockUpdateQueue->extract()["data"];
+			if(!$this->isInLoadedTerrain($vec)){
+				continue;
+			}
+			$block = $this->getBlock($vec);
 			unset($this->scheduledBlockUpdateQueueIndex[Level::blockHash($block->x, $block->y, $block->z)]);
 			$block->onScheduledUpdate();
 		}