[NTG-context] sqrt does not align properly

Peak of the root ends at baseline, but only in some cases: \starttext   $\sqrt{2}$ \qquad $\sqrt{a^2+b^2}$ \qquad $\sqrt{a^2-b^2}$ \stoptext In this example only \sqrt{a^2+b^2} works as expected [ConTeXt  ver: 2021.04.29 23:09 LMTX  fmt: 2021.5.4] Typesetting in ConTeXt live is correct. Benny