[NTG-context] bug with en and em dashes

Dear list, using latest beta from 2017.05.09 10:14 with the following sample: \starttext \startTEXpage[offset=1em] -- --- – — \stopTEXpage \stoptext I get as result: -- ---- -- ---- Ligatures aren’t converted and even real en and em dashes are converted to hyphens. Could anyone confirm the issue? Many thanks for your help, Pablo -- http://www.ousia.tk