Final Update. I'm happy to say found the real issue behind this. Issue is the docker service discovery. Due to some reason docker service discovery not happened. as soon as I change the elasticsearch host to IP get the real performance.
Previous kibana configuration
ELASTICSEARCH_HOSTS: "http://elasticsearch:9550"
New configuration
ELASTICSEARCH_HOSTS: "http://172.20.1.2:9550"
@Brandon_Kobel, Thank you again.