ENGCOM-2356: [Backport] FIX for apparently random API failures while using array types #16828

 - Merge Pull Request #16828 from ronak2ram/magento2:2.1-develop-PR-port-16137
 - Merged commits:
   1. 64fc3c2

Author: magento-engcom-team

lib/internal/Magento/Framework/Reflection/TypeProcessor.php

@@ -555,7 +555,7 @@ public function getParamType(ParameterReflection $param)
         if ($type == 'array') {
             // try to determine class, if it's array of objects
             $docBlock = $param->getDeclaringFunction()->getDocBlock();
-            $pattern = "/\@param\s+([\w\\\_]+\[\])\s+\\\${$param->getName()}\n/";
+            $pattern = "/\@param\s+([\w\\\_]+\[\])\s+\\\${$param->getName()}[\n\r]/";
             $matches = [];
             if (preg_match($pattern, $docBlock->getContents(), $matches)) {
                 return $matches[1];