How to filter for files using rest api ( sharepoint online )?

Why doesn't the following string returns data from within a folder in the same asset library:

Asset Library Name is Production_Library

Folder Name is at the top level of the asset library and is named Communication Management

The filter works nicely here at the /items level filtering against the Business Process field.

http://ift.tt/167uaYN eq 'Communication Management'

However, the filter doesn't work at all here within the folders against the Name Field.

http://ift.tt/1CYG58O eq 'Communication Management'