Converted content package is missing some .content.xml

kpauls, when trying to install the converted content package as attached to  SLING-10467 the import failed with ConstraintViolationException because the intermediate nodes for the demo-cp group and the regular user does no longer come with a .content.xml defining it's node type and jackrabbit fvault resorting to it's nt:folder default, which is not allowed by rep:AuthorizableFolder.

In order to exclude the possibility that this is caused by the rep:policy node attached to the user/group folder nodes containing an ACE for one of the service users in the package, I created a slightly modified package that doesn't come with a AC policy at /home/groups/demo-cp (but still has one with /home/users/demo-cp).

Running the converter however returned the same output:
There is no longer exists a .content.xml file with neither the intermediate authorizable folder mentioned above. Not sure where that gets lost, but it looks like a bug to me (and will essentially prevent the converted content package from being installed).
Am I missing something???