Bind dir from host through container to the nested container

LXD
,
1

I want to bind dir from the host to the nested container. I use:

mydir:
  path: /mydir
  source: /mydir
  type: disk

in container’s profile and it works fine, but when I do the same in container, to bind dir further to the nested container, it doesn’t report any error.
mountpoint /mydir answers /mydir is a mountpoint, but I can’t see files from host’s /mydir in nested container (only in level 1 container). In the nested container mydir is empty.
Also when I put some files in /mydir in nested container I can’t see them at the host’s /mydir.
How to do this properly?