ClientHost is not my IP

OK, issue is the ipv6 support. If ipv6 is disabled, and I call with an ipv6, ClientHost is the gateway not the true IP. To fix that:

networks:
  frontend:
    enable_ipv6: true
    driver: bridge
    driver_opts:
      com.docker.network.enable_ipv6: "true"
    ipam:
      driver: default
      config:
      - subnet: 172.18.0.0/16
        gateway: 172.18.0.1
      - subnet: 2001:db8:2::/64