Problem running Celery task inside Docker container

What I have

I have a container with Django app that executes a Celery task whose purpose is to delete some files that are the media folder, that container is called backend in docker-compose.yml.

Problem

the problem is that the Celery Worker and Celery beat container runs normally and execute the task but does not delete media files. it may be that the problem lies in the volumes mounted on the containers and somehow Celery does not find the media files to be deleted.

docker-compose.yml

version: '3.8'

services:
  # Django app that will upload the files from the admin and that will be deleted by the Celery task.
  backend:
    expose:
      - 8000
    build:
      context: .
      dockerfile: ./Dockerfile
    networks:
      - backend-tier
    depends_on:
      - db

  redis:
    image: library/redis:5.0-alpine
    ports:
      - 6379:6379
    restart: unless-stopped
    networks:
      - backend-tier
    volumes:
      - valor-redis:/data

  worker:
      build:
        context: .
        dockerfile: ./Dockerfile
      command: celery -A config --app=config.celery_app:app worker --loglevel=info
      restart: unless-stopped
      networks:
        - backend-tier
      depends_on:
        - redis
      volumes:
        - ./app_com_co/:/app/app_com_co:Z,cached
        - ./app_com_co/templates/:/app/app_com_co/templates:Z,cached
        # shared volume between worker and backend for media
        - app-media:/app/app_com_co/media
  
  beat:
    build:
      context: .
      dockerfile: ./Dockerfile
    command: celery -A config --app=config.celery_app:app beat --loglevel=info
    restart: unless-stopped
    networks:
      - backend-tier
    depends_on:
      - redis
    volumes:
      - ./app_com_co/:/app/app_com_co:Z,cached
      - ./app_com_co/templates/:/app/app_com_co/templates:Z,cached
      # shared volume between beat and backend for media
      - app-media:/app/app_com_co/media

volumes:
  app-redis:
    driver: local
  app-media:

networks:
  backend-tier:
    driver: bridge