PHP Debug for Slowness using ElasticSearch PHP Client

Currently an application is developed using pimcore - a php framework which uses elasticSearch service using the elasticSearch PHP client , We have an random slowness i.e high respinse time around 2 minutes while making request through the easticsearch-php client where as directly hitting to elastisearch using kibana hosted on aws in always less than 2ms. Need to debug/ fix this random slowness