I think this must be a bug. When you “hoist” the binder so you’re focused on just one piece of the outline and then add a new folder, that folder gets added to the root of the binder, so you can’t see it. To reproduce:
- Select a section and pick View > Outline > Hoist Binder
- In the binder area, right-click > Add > New Folder. Nothing appears to happen.
- Unhoise the binder and you’'ll find your new folder Untitled at the root of the binder.
Same thing happens with Add > New Text
All these options should respect the hoisting and create within that area.