Kontext rule for formatting only the first child section in a chapter

Hi all, I have run into a DITA problem. Each chapter of the document, i.e. top-level topic, contains a miniature toc of the nested sections. Therefore the first child topic's title should receive a page break.

I tried this context rule for the title element, below you find the screenshot which I have tried to translate because the EDD is in German. Even though I define that the context should be the first parent topic only, the result is that every second-level topic now has a page break. Any ideas?

8. Count ancestors: topic

    concept

    task

    reference

    If level is: 2

      8.1 If context is: (topic{first} | concept{first} | task{first} | reference{first})

            ..then set page break.

Robert