[NTG-context] thin and narrow unicode spaces not rendered

Hello, The thin space and the narrow no-break space are not typeset: \starttext THIN SPACE (U+2009): 50 \% NARROW NO-BREAK SPACE (U+202F): 50 \% NO-BREAK SPACE (U+00A0): 50 \% \type{\,}: 50\,\% \stoptext About one year ago, this used to work. Bug or feature? -- Peter