[NTG-context] odd and even test: incorrect behavior on the first two lines

Hi, I'm trying to make the content of an environment behave differently weither it appears on a right page or on a left page. It works mainly, except that with the following code, from the second page, the two first lines of subsequent pages don't show the expected behavior. \setuppagenumbering[alternative=doublesided] \definestartstop[foo][ before={\doifrightpageelse{(right)}{(left)}}, ] \starttext \dorecurse{100}{ \startfoo hello world\par \stopfoo } \stoptext Is it a known problem? How can one fix this? Thanks, Alex -- Alexandre Leray media & graphic design http://stdin.fr | http://osp.constantvzw.org/ rue Gallaitstraat 80 1030 Bruxelles +32 (0)4 87 04 70 30