[NTG-context] oldstyle numbers and copy pasting from pdf

Hi, I cannot copy oldstyle numbers from a pdf. Consider \usetypescript[palatino] \setupbodyfont[palatin,12pt] \setfontfeature{oldstyle} \starttext 12345 \stoptext When I copy from pdf (or run pdftotext) I get   How do I correct this? Aditya