[NTG-context] problem with \setupdelimitedtext

In the following, the indentation using \startblockquote is twice what it should be: \setupdelimitedtext [blockquote] [before={\blank[small,fixed] \setupnarrower[left=1.5pc,right=0pc] \startnarrower[left,right] \noindentation}, after={\par\stopnarrower \blank[small,fixed] \noindentation}] \starttext \input ward \setupnarrower[left=1.5pc,right=0pc] \startnarrower[left,right] \input ward \stopnarrower \startblockquote \input ward \stopblockquote \stoptext What have I missed? Alan