[NTG-context] wrong page break

Hans, I have found the another wrong page break in this sample: \showframe\showgrid \setupbodyfont[pagella,15pt] \starttext \chapter{Chapter title} \section{Section title} \dorecurse{140}{Sentence. } \subsection{Subsection title} This is another line. \stoptext It works fine when replacing \subsection with \section. And it also fails when replacing \subsection with \subsubsection. I guess it might be a bug. Many thanks for your help, Pablo -- http://www.ousia.tk