[NTG-context] math \prime with subscripts

Hi is there a way for \prime not get smaller when used with sub/superscripts? Or realigned somehow? Without font changes would be nice. \starttext \startformula \frac13T\prime_{rs}T\prime_{st}T\prime_{tr} \stopformula \startformula \frac13T_{rs}\prime T_{st}\prime T_{tr}\prime \stopformula \stoptext Thanks YT