Where-used: show incoming links does not display the links

Steps to reproduce:

Create new folder below news
create new document sw1 of type event
create new document sw2 of type article
in the xinha field of sw1 make an internal link to sw1, done
go to sw2 and ask for incoming links

no links are displayed

when deleting sw2 the delete dialog does show that sw1 refers to sw2.

Seems that the unpublished state has to do with it. After publishing the documents in folder the information is shown correctly.