Need Help with a CMS Collection List


I have created an index for specialists. This index contains a nested collection list with more than 5 objects (Angebote und Sprache). I have used the following page as a template for the script:

However, it now shows no objects for certain items. For example for Pepe-Truffer Marliese. Angebote und Sprache is missing although the entries are available

Only, if a filter is activated!

Here is the live site: Stillberaterinnen Verzeichnnis

shared read only link

Can someone help me?

Thank you very much.