Gunicorn reload fail with uvicorn worker class with docker-compose

I am running two services nginx and fastapi with gunicorn as server and uvicorn worker class as workers managed by gunicorn

ISSUE:

fastapi service is unable to reload changes on Hot Reload --reload

I have made sure that.

• Volume is set as - .:/root/nlpengine
• I have also checked using bash the changes within docker are visible
• using uvicorn as server reload works. cmd: uvicorn --reload ...

docker-compose.yaml

  nlpengine:
    build: 
      context: ./
      dockerfile: Dockerfile
      args:
        options: --reload
    container_name: nlpengine
    working_dir: /root/nlpengine
    command: gunicorn 'app.api:app' --bind 0.0.0.0:8000 --timeout 120 -k uvicorn.workers.UvicornWorker --workers 2 --threads=2 --worker-connections=100 --reload --reload-engine 'poll' --chdir /root/nlpengine
    volumes:
      - .:/root/nlpengine
    networks:
      my-network:
        aliases:
          - nlpengine-app

also getting this log which affirms the changes are visible inside the docker

nlpengine | [2022-09-18 15:24:17 +0000] [9] [INFO] Worker reloading: /root/nlpengine/app/api.py modified

I am going to create an issue at gunicorn github repo as well. Meanwhile Please advise if anyone has experienced this issue before.

My first thoughts are that this might be due to gunicorn incompatibility with fastapi due to A/WSGI standards