[NTG-context] Stoppers in captions also appear in references

Hi, There is a problem with the references to figures (command \in[...]) when you put a stopper for the captions: the stopper also appears in the references. Here is a minimal example: \starttext \setupcaptions[numberstopper=\quad\emdash] \placefigure[][cow]{A cow}{\externalfigure[cow]} This is the figure \in[cow]. \stoptext How to avoid that?