diff --git a/vendor/magento/module-reports/Model/ResourceModel/Report/Collection/AbstractCollection.php b/vendor/magento/module-reports/Model/ResourceModel/Report/Collection/AbstractCollection.php
index 3c78b22c84b..792c81372c0 100644
--- a/vendor/magento/module-reports/Model/ResourceModel/Report/Collection/AbstractCollection.php
+++ b/vendor/magento/module-reports/Model/ResourceModel/Report/Collection/AbstractCollection.php
@@ -28,7 +28,7 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle
     protected $_to = null;

     /**
-     * Period
+     * Period to be set as null
      *
      * @var string
      */
@@ -42,21 +42,21 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle
     protected $_storesIds = 0;

     /**
-     * Is totals
+     * Is totals to be set as false
      *
      * @var bool
      */
     protected $_isTotals = false;

     /**
-     * Is subtotals
+     * Is subtotals to be set as false
      *
      * @var bool
      */
     protected $_isSubTotals = false;

     /**
-     * Aggregated columns
+     * Aggregated columns to be assigned as an array
      *
      * @var array
      */
@@ -64,6 +64,7 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle

     /**
      * Set array of columns that should be aggregated
+     *
      * @codeCoverageIgnore
      *
      * @param array $columns
@@ -77,6 +78,7 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle

     /**
      * Retrieve array of columns that should be aggregated
+     *
      * @codeCoverageIgnore
      *
      * @return array
@@ -88,6 +90,7 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle

     /**
      * Set date range
+     *
      * @codeCoverageIgnore
      *
      * @param mixed $from
@@ -103,6 +106,7 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle

     /**
      * Set period
+     *
      * @codeCoverageIgnore
      *
      * @param string $period
@@ -150,7 +154,10 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle
      */
     public function addStoreFilter($storeIds)
     {
-        $this->_storesIds = $storeIds;
+        //if (!is_array($this->_storesIds) && $this->_storesIds === 0) {
+            $this->_storesIds = $storeIds;
+        //}
+
         return $this;
     }

@@ -171,7 +178,8 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle

         $storeIds = array_unique($storeIds);

-        if ($index = array_search(null, $storeIds)) {
+        $index = array_search(null, $storeIds);
+        if ($index !== false) {
             unset($storeIds[$index]);
             $nullCheck = true;
         }
@@ -222,6 +230,7 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle

     /**
      * Setter for isSubTotals
+     *
      * @codeCoverageIgnore
      *
      * @param bool $flag
@@ -244,6 +253,8 @@ class AbstractCollection extends \Magento\Framework\Model\ResourceModel\Db\Colle
     }

     /**
+     * Init select to return the current class
+     *
      * @return $this
      */
     protected function _initSelect()