@@ -40,7 +40,7 @@ class QueryList
 {
     protected $query;
     protected $kernel;
-    protected static $plugins = [];
+    protected static $instance = null;
 
     /**
      * QueryList constructor.
@@ -74,14 +74,14 @@ public function __destruct()
     }
 
     /**
-     * Get the QueryList instance
+     * Get the QueryList single instance
      *
      * @return QueryList
      */
     public static function getInstance()
     {
-        $instance = new self();
-        return $instance;
+        self::$instance || self::$instance = new self();
+        return self::$instance;
     }
 
     /**
Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ class QueryList`
`40`	`40`	`{`
`41`	`41`	`protected $query;`
`42`	`42`	`protected $kernel;`
`43`		`- protected static $plugins = [];`
	`43`	`+ protected static $instance = null;`
`44`	`44`
`45`	`45`	`/**`
`46`	`46`	`* QueryList constructor.`
`@@ -74,14 +74,14 @@ public function __destruct()`
`74`	`74`	`}`
`75`	`75`
`76`	`76`	`/**`
`77`		`- * Get the QueryList instance`
	`77`	`+ * Get the QueryList single instance`
`78`	`78`	`*`
`79`	`79`	`* @return QueryList`
`80`	`80`	`*/`
`81`	`81`	`public static function getInstance()`
`82`	`82`	`{`
`83`		`- $instance = new self();`
`84`		`- return $instance;`
	`83`	`+ self::$instance \|\| self::$instance = new self();`
	`84`	`+ return self::$instance;`
`85`	`85`	`}`
`86`	`86`
`87`	`87`	`/**`