[NTG-context] \setupformulas and \frac give small symbols

Hi, with a standalone installation updated today, I get smaller letters in \frac if \setupformulas[align=flushleft] is applied. The test file below generates the attached pdf. /Mikael \starttext \startformula z=\frac{x}{y} \stopformula \setupformulas[align=flushleft] \startformula z=\frac{x}{y} \stopformula \stoptext