Filesystem-based DX Item types behaving like a folder?

[zopyx (Andreas Jung)]

It is known that TTW content-types behave out of the box like a folderish (for good or bad).

But now this behavior also seems to apply to filesystem-based content-types derived from plone.dexterity.content.Item.

See

Issue: Content types derived from DX Item behaves like a folderish item

Is this a bug or a feature?

-aj