Rudder

I try to manage some docker-compose files with rudder.
I use the directive "file content" with the "enforce content by section"
I have header and footer (with # for docker-compose ignore them) and the content is : 

demo-backend:
    image: registry.gitlab.com/some-backend:3.6
    volumes:
      - "..." 
    networks:
      - demo-network

demo-frontend:
    image: registry.gitlab.com/some-frontend:3.6
    volumes:
      - "..." 
    ports:
      - "8091:80" 
    networks:
      - demo-network
    depends_on:
      - demo-backend

networks:
demo-network:
driver: bridge

First problem is that the space at the beginning is removed when i save ... and this space is important
Second problem is that some lines are missing after a run. The section "networks: -demo-network" in the demo-frontend service is missing. If I had some char on the lines, they are added. I thing rudder ignore it because those 2 lines are already on the demo-backend section. But i need those lines on two services ....