diff --git a/src/ValidatorChain.php b/src/ValidatorChain.php
index 9d0e70f80..0c8f1bded 100644
--- a/src/ValidatorChain.php
+++ b/src/ValidatorChain.php
@@ -262,7 +262,7 @@ public function isValid($value, $context = null)
     public function merge(ValidatorChain $validatorChain)
     {
         foreach ($validatorChain->validators->toArray(PriorityQueue::EXTR_BOTH) as $item) {
-            $this->attach($item['data'], $item['priority']);
+            $this->attach($item['data']['instance'], $item['data']['breakChainOnFailure'], $item['priority']);
         }
 
         return $this;
@@ -299,6 +299,14 @@ public function __invoke($value)
         return $this->isValid($value);
     }
 
+    /**
+     * Deep clone handling
+     */
+    public function __clone()
+    {
+        $this->validators = clone $this->validators;
+    }
+
     /**
      * Prepare validator chain for serialization
      *
diff --git a/test/ValidatorChainTest.php b/test/ValidatorChainTest.php
index 93c1ca802..b7180e944 100644
--- a/test/ValidatorChainTest.php
+++ b/test/ValidatorChainTest.php
@@ -186,6 +186,42 @@ public function testPrependValidatorsAreExecutedAccordingToPriority()
         $this->assertArrayHasKey('error', $messages);
     }
 
+    /**
+     * @group 6386
+     * @group 6496
+     */
+    public function testMergeValidatorChains()
+    {
+        $mergedValidatorChain = new ValidatorChain();
+
+        $mergedValidatorChain->attach($this->getValidatorTrue());
+        $this->validator->attach($this->getValidatorTrue());
+
+        $this->validator->merge($mergedValidatorChain);
+
+        $this->assertCount(2, $this->validator->getValidators());
+    }
+
+    /**
+     * @group 6386
+     * @group 6496
+     */
+    public function testValidatorChainIsCloneable()
+    {
+        $this->validator->attach(new NotEmpty());
+
+        $this->assertCount(1, $this->validator->getValidators());
+
+        $clonedValidatorChain = clone $this->validator;
+
+        $this->assertCount(1, $clonedValidatorChain->getValidators());
+
+        $clonedValidatorChain->attach(new NotEmpty());
+
+        $this->assertCount(1, $this->validator->getValidators());
+        $this->assertCount(2, $clonedValidatorChain->getValidators());
+    }
+
     public function testCountGivesCountOfAttachedValidators()
     {
         $this->populateValidatorChain();