[NTG-context] oldstyle math

I no longer get oldstyle numerals in the math environment (ConTeXt ver: 2021.04.29 ) with \definefontfamily[mainface][rm][STIX Two Text] [protrusion=quality, expansion=quality, mode=node, force=yes, features={default, f:oldstyle}, ] \definefallbackfamily[mainface] [mm] [STIX Two Text] [range=digitsnormal, force=yes, features=f:oldstyle, ] \definefontfamily[mainface][mm][STIX Two Math] \setupbodyfont[mainface, 10pt] \starttext 123456789 \m{123456789} \stoptext What have I missed? Alan