Kovolute view not showing all content

[domsteinbach]

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request
[ ] support request

Current behavior
In convolute view http://localhost:5555/notizbuecher/notizbuch-1952-1954 not all imported poems/notes are displayed in the grid. Two poems with title "[Notizen 1]" and "[Notizen 2] are not displayed.

Expected behavior
They should be displayed among the other poems/notes as they are existing in the database and they are displayed in our old "zurich"-version as well as on the projects page (https://kunoraeber.ch/lyrik/index.php/component/jak2filter/?Itemid=139&category_id=28,31&searchword=Notiz).

Reproduction of the problem with instructions

• They are existing in the database (http://salsah2.nie-ine.ch/search/fulltext/Notizen)
• BTW: The Knora API does not allow searching for terms with special characters like "["

Please tell us about your environment:
just checkout the latest develop branch.