Bookmarks not showing up when creating hyperlink

Hi,

Maybe someone can help me out please.

I'm trying to create a hyperlink and link a bookmark to it inside the same page. I created the bookmarks, however they are not showing up in the list and neighter when I search for the ID.

There is 2 other bookmark which was already on the page and they showing up just fine. I cannot see any difference between the bookmarks I created and which where already there.