diff --git a/src/world/format/Chunk.php b/src/world/format/Chunk.php
index de5b21577..833e31902 100644
--- a/src/world/format/Chunk.php
+++ b/src/world/format/Chunk.php
@@ -476,6 +476,15 @@ class Chunk{
 		}
 	}
 
+	public function __clone(){
+		//we don't bother cloning entities or tiles since it's impractical to do so (too many dependencies)
+		$this->subChunks = \SplFixedArray::fromArray(array_map(function(SubChunk $subChunk) : SubChunk{
+			return clone $subChunk;
+		}, $this->subChunks->toArray()));
+		$this->heightMap = clone $this->heightMap;
+		$this->biomeIds = clone $this->biomeIds;
+	}
+
 	/**
 	 * Hashes the given chunk block coordinates into a single integer.
 	 *
diff --git a/src/world/format/SubChunk.php b/src/world/format/SubChunk.php
index 46026b833..5328d816a 100644
--- a/src/world/format/SubChunk.php
+++ b/src/world/format/SubChunk.php
@@ -23,6 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\world\format;
 
+use function array_map;
 use function array_values;
 use function count;
 
@@ -141,4 +142,13 @@ class SubChunk{
 		$this->skyLight->collectGarbage();
 		$this->blockLight->collectGarbage();
 	}
+
+	public function __clone(){
+		$this->blockLayers = array_map(function(PalettedBlockArray $array) : PalettedBlockArray{
+			return clone $array;
+		}, $this->blockLayers);
+
+		$this->skyLight = clone $this->skyLight;
+		$this->blockLight = clone $this->blockLight;
+	}
 }
diff --git a/tests/phpunit/world/format/ChunkTest.php b/tests/phpunit/world/format/ChunkTest.php
new file mode 100644
index 000000000..17d277b52
--- /dev/null
+++ b/tests/phpunit/world/format/ChunkTest.php
@@ -0,0 +1,45 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\world\format;
+
+use PHPUnit\Framework\TestCase;
+
+class ChunkTest extends TestCase{
+
+	public function testClone() : void{
+		$chunk = new Chunk(0, 0);
+		$chunk->setFullBlock(0, 0, 0, 1);
+		$chunk->setBiomeId(0, 0, 1);
+		$chunk->setHeightMap(0, 0, 1);
+
+		$chunk2 = clone $chunk;
+		$chunk2->setFullBlock(0, 0, 0, 2);
+		$chunk2->setBiomeId(0, 0, 2);
+		$chunk2->setHeightMap(0, 0, 2);
+
+		self::assertNotSame($chunk->getFullBlock(0, 0, 0), $chunk2->getFullBlock(0, 0, 0));
+		self::assertNotSame($chunk->getBiomeId(0, 0), $chunk2->getBiomeId(0, 0));
+		self::assertNotSame($chunk->getHeightMap(0, 0), $chunk2->getHeightMap(0, 0));
+	}
+}
diff --git a/tests/phpunit/world/format/SubChunkTest.php b/tests/phpunit/world/format/SubChunkTest.php
new file mode 100644
index 000000000..61fd9dee1
--- /dev/null
+++ b/tests/phpunit/world/format/SubChunkTest.php
@@ -0,0 +1,50 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\world\format;
+
+use PHPUnit\Framework\TestCase;
+
+class SubChunkTest extends TestCase{
+
+	/**
+	 * Test that a cloned SubChunk instance doesn't influence the original
+	 */
+	public function testClone() : void{
+		$sub1 = new SubChunk(0, []);
+
+		$sub1->setFullBlock(0, 0, 0, 1);
+		$sub1->getBlockLightArray()->set(0, 0, 0, 1);
+		$sub1->getBlockSkyLightArray()->set(0, 0, 0, 1);
+
+		$sub2 = clone $sub1;
+
+		$sub2->setFullBlock(0, 0, 0, 2);
+		$sub2->getBlockLightArray()->set(0, 0, 0, 2);
+		$sub2->getBlockSkyLightArray()->set(0, 0, 0, 2);
+
+		self::assertNotSame($sub1->getFullBlock(0, 0, 0), $sub2->getFullBlock(0, 0, 0));
+		self::assertNotSame($sub1->getBlockLightArray()->get(0, 0, 0), $sub2->getBlockLightArray()->get(0, 0, 0));
+		self::assertNotSame($sub1->getBlockSkyLightArray()->get(0, 0, 0), $sub2->getBlockSkyLightArray()->get(0, 0, 0));
+	}
+}