A field does not appear in the field list after adding in the Views UI

The behavior has been found in Views 7.x-3.8 and Drupal 7.33

Here is the process description.

1) Enter the Taxanomy view
2) Push the Add button
3) Choose the field (mark):
Content: Forsidebillede
Appears in: node:article, node:forum.
4) Press Apply (all displays)
5) The field does not appear in the field list.

The field is an image field created on both the Article and the Forum content types.

Edit - 2014-12-03: I am not able to add the relationship either: Content: Forsidebillede (field_article_front_page_image:fid)
Appears in: node:article, node:forum.

Any hints?

Thanks for your time!

BR. GrN.dk