[LSIO OSCam] Another chown: changing ownership of '/config': Operation not permitted topic

LSIO Discussion Container Support
1

I have sevral LSIO containers running without user/group right issues except for OSCam.
No matter what i change it always returns the following error:

chown: changing ownership of ‘/config’: Operation not permitted
chown: changing ownership of ‘/config/oscam/oscam.conf’: Operation not permitted
chown: changing ownership of ‘/config/oscam’: Operation not permitted
chown: changing ownership of ‘/config’: Operation not permitted
s6-rc: warning: unable to start service init-oscam-config: command exited 1

I tried several times with and without PUID/PGID and as root etc without luck.
Also the rigths on the shares/folders OSCam needs access to are correct. Tried to change this several times. chmod 777 recursivly on all folders and the same for owner did not have any effect on it.

Any ideas?
I don’t get it because I have several LSIO containers running with the same principal without issues.

My current docker-compose

version: "2.1"
services:
  oscam:
    image: lscr.io/linuxserver/oscam:latest
    container_name: oscam
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/Amsterdam
    volumes:
      - /mnt/docker_data/oscam-data:/config

    ports:
      - 8888:8888
    #devices:
    #  - /dev/ttyUSB0:/dev/ttyUSB0
    restart: unless-stopped