[NTG-context] Undesired indent in enumerations (mk4)

Dear all, when I have an enumeration with empty text (i.e. text={},), mk4 produces undesired indenting. mk2 works ok. Here a minimal example: \setupbodyfont [10pt] \defineenumeration [exercise] [before=\blank, after=\blank, way=bysection, text={}, start=1, location=hanging, letter=rm] \starttext \section{Addition} \startexercise $1+1=?$ \stopexercise \stoptext