Merge pull request #254 from taoufiqaitali/patch-1

avoid calling function twice, data already exist

Observer/TriggerPurchaseDataLayerEvent.php

@@ -32,7 +32,7 @@ public function execute(Observer $observer)
 
         $this->checkoutSessionDataProvider->add(
             'purchase_event',
-            $this->purchaseEvent->setOrder($order)->get()
+            $purchaseEventData
         );
     }
 }