[Podman] --root on a separately mounted filesystem - partly not working - ?

Hi guys. I have a some bits such as images, containers on a separate disk which disk mounts at boot time, then 'podman' is called with '--root' to that mount-point - pretty regular stuff. All works until system reboots. After reboot I see: -> $ podman-apps container ls ERRO[0000] Joining network namespace for container d00badc4665ca3eae92b720925e6088e534ec81e01153d9d85f81eccf87d6a62: error retrieving network namespace at /run/user/2503/netns/netns-77b9d3b5-6522-741a-0d12-34921bf12828: failed to Statfs "/run/user/2503/netns/netns-77b9d3b5-6522-741a-0d12-34921bf12828": no such file or directory Error: error joining network namespace of container d00badc4665ca3eae92b720925e6088e534ec81e01153d9d85f81eccf87d6a62: error retrieving network namespace at /run/user/2503/netns/netns-77b9d3b5-6522-741a-0d12-34921bf12828: failed to Statfs "/run/user/2503/netns/netns-77b9d3b5-6522-741a-0d12-34921bf12828": no such file or directory at which point I can: -> $ podman-apps system reset I can re-create my containers and all seems to work until, next reboot when I get errors as above. 'podman-apps' is an alias to 'podman --root /my-mountpoint' What is failing here? Some dependencies I cannot see which cause this failure? many thanks, L.