Default value of "any" gives empty results in Drupal 8.x

A basic filter that does not have the "required" option selected results in an empty result set.

To repro:

1. Install Drupal 8.0.0 using the Standard profile
2. Log in as admin and navigate to /admin/structure/views/view/content
3. Click on the "Content: Type" filter and tick the "Allow multiple selections" option
4. Under "Exposed form style" click "Basic"
5. Tick "Better Exposed Filters" and "Apply"
6. On the next screen, set the "type" filter to checkboxes/radio buttons
7. "Apply" and "Save"
8. Navigate to /admin/content

Note: no results shown.