POST request with node fetch at action level to Elastic Search API running on port 36029 responses error 503 timeout

Actually it happens with any method type (post/put/get/delete) request with node fetch at action level to Elastic Search API running on port 36029 responses error 503 timeout, i have events that triggers actions in this case if send a the same request from postman it works fine but the request done at action level when is triggered it responses error 503 timeout which makes me suspect there is some kind of restriction on request sent from adobe io runtime on api endpoints running on non standard ports such like 36029, my question is: can this be possible? and if so how can i change this?