diff --git a/src/pocketmine/world/World.php b/src/pocketmine/world/World.php
index 3f0a725003..b1f233bbec 100644
--- a/src/pocketmine/world/World.php
+++ b/src/pocketmine/world/World.php
@@ -755,7 +755,12 @@ class World implements ChunkManager{
 
 		//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($this->scheduledBlockUpdateQueueIndex[World::blockHash($block->x, $block->y, $block->z)]);
 			$block->onScheduledUpdate();
 		}