Facing response buffering was turned off even when I enabled it via annotations

[sahil-sharma]

I am having versions as mentioned below:

Kong version: 2.5.0-ubuntu (docker image)
Kong-Ingress-Controller: 1.3.2
Host OS: Ubuntu-20.04
K8s version: v1.20.1

I have installed a custom plugin (to my Kong docker image) that injects a Cookie response header to the client in every response (on a specific route).
I am able to receive a response back with HTTP 20X but there is no such header to the client while I added a Correlation-ID plugin and that I am able to get.
There is no error in Kong-Ingress-Controller Pod but, in Kong-Proxy pod I am seeing the above error.
I have added this annotation to my Ingress YAML file: taken from here

konghq.com/response-buffering: "true"

The flow of request/response is like this:
Request: Client ---> Kong ----> Backend service
Response: Backend service ----> Kong (here kong injects the header) ----> Client
Is this correct or should I add something else? Any hints on this.

[sahil-sharma]

After a bit of debugging I found that we need to remove this from Kong YAML file:

- name: KONG_PROXY_LISTEN
  value: 0.0.0.0:8000, 0.0.0.0:8443 ssl http2

After making the change it was working.
Sorry for the noise.