Without further ado, the following was found: Issue: mount point I<B> → mount I<B> "Here, I<B> is the destination mount, and I<b> is a subdirectory path under " "the mount point I<B>. The propagation type of the resulting mount, I<B/b>, " "follows the same rules as for a bind mount, where the propagation type of " "the source mount is considered always to be private."