VBO "Modify entity values" not showing fields with permissions

Drupal 7.14
Field Permisssions 7.x-1.0-beta2
VBO 7.x-3.0-rc1

On the User page I have added three select list fields and have created a role called "User Admins".

I have Custom Permissions set on these fields to only allow Authenticated users to view these values on their own User Page, but "User Admins" role and "Administrators" have all the boxes ticked (Create, Edit, View, etc...)

When a user with the "User Admin" role views any user's page individually, they can view and edit the values as expected. Works a treat! Thank you :)

However... when they select a number of users from a view I created, and then run the "Views Bulk Operation" of "Modify entity values", they are shown the list of fields and are able to tick the ones they want to edit, but the fields are not shown.

If an Administrator does the same, they are visible and able to modify them in bulk.

Not sure if this is a VBO or Field Permissions bug. Any thoughts on how I can debug this? Keen to help out.

Thanks,
Darren