Under Workbench 'File List' tab, nothing appears in field 'On Node'.

I have a new install of Workbench Media 7.x-2.1 with File Entity 7.x-2.0-beta1 and Media 7.x-2.0-Alpha4. When I view the 'File List' tab everything appears functional except the 'On Node' field which is always blank. The view appears to be returning no result. Has anyone else experienced this issue?

[UPDATE] Upon further inspection, I've noticed that it does not appear under the /file/{id}/usage either.

Thanks. - John