[NTG-context] Setting `before` option of chapter breaks header text

3 Sep 2013

      If chapter titles are styled using the `before` option, the header texts on each first page of the documents (body|back|appendix)part are incorrect, because chapter name and number are empty. 
(Tested with ConTeXt version 2013.05.28 00:36 and 2013.09.03 10:22)

Is this a bug? (If not, is there any other way to set `before` without breaking the headers?)

Here an example:

    \setuphead[chapter][
        before=\hairline\blank,  %<<< headers work, if this line is removed
        after=\nowhitespace\hairline,
    ]

    \setuppagenumbering[location=]  % clear page numbers

    \startsectionblockenvironment[frontpart]
        \setupheadertexts[chapter][pagenumber]
    \stopsectionblockenvironment

    \startsectionblockenvironment[bodypart]
        \setupheadertexts[{Chapter \getmarking[chapternumber]: \getmarking[chapter]}][pagenumber]
    \stopsectionblockenvironment

    \startsectionblockenvironment[backpart]
        \setupheadertexts[chapter][pagenumber]
    \stopsectionblockenvironment

    \startsectionblockenvironment[appendix]
        \setupheadertexts[{Appendix \getmarking[chapternumber]: \getmarking[chapter]}][pagenumber]
    \stopsectionblockenvironment

    \starttext
        \startfrontmatter
            \chapter{Front One}
            Here the header is correct.
            \chapter{Front Two}
        \stopfrontmatter

        \startbodymatter
            \chapter{Body One}
            Incorrect header on this page.
            \page[yes]
            Here the header is correct.
            \chapter{Body Two}
        \stopbodymatter

        \startbackmatter
            \chapter{Back One}
            Incorrect (none) header on this page.
            \chapter{Back Two}
        \stopbackmatter

        \startappendices 
            \chapter{Appedix One}
            Incorrect header on this page.
            \chapter{Appedix Two}
        \stopappendices
    \stoptext

Regards,
Michael

[NTG-context] Setting `before` option of chapter breaks header text

Michael Scholtz