[NTG-context] startstop, narrower and switchtobodyfont gives strange interlinespace

Hi, with the latest standalone, the file below runs, but gives strange results. Look at the interline space in the last paragraph (starting with "But a system...") of the document. It is too big. Resulting pdf is attached. What am I doing wrong? Any ideas to solve it (i.e. to be able to define an environment with narrower smaller text, including a reduced interlinespace)? /Mikael \definestartstop[passus][ before={\startnarrower}, after={\stopnarrower}, style={\switchtobodyfont[9pt]}, ] \starttext \subject{It looks OK here:} \input knuth \startnarrower \switchtobodyfont[9pt] \input knuth \stopnarrower \subject{It does not here:} \input knuth \startpassus \input knuth \stoppassus \stoptext