fix:stream

@@ -50,14 +50,8 @@ class Response implements ResponseInterface
      */
     public function getContent(): string
     {
-        static $content = null;
+        $this->response->getBody()->rewind();
 
-        if (is_null($content)) {
-            $this->response->getBody()->rewind();
-
-            $content = $this->response->getBody()->getContents();
-        }
-
-        return $content;
+        return $this->response->getBody()->getContents();
     }
 }