[NTG-context] After using a custom command in the title, the table of contents is not generated properly

As described, here is example: %%%%% \def\cmd#1{{\tt\textslash #1}} \def\cmdii#1{\tt #1} \def\cmdiii#1{\rm #1} \starttext \placecontent% if i dont place toc command , ConText can render it. \chapter{anything else} \section{\cmdi{with command} section} \section{\cmdii{with command} section} \section{\cmdiii{with command} section} \section{{\rm with command} section} % only this one work well \stoptext %%%% Am I missing something important? If so, please tell me what to do. Thank you so much. Muyik