[NTG-context] numerator is too high in \frac{3}{4}, in palatino

[Sanjoy Mahajan]

I've noticed the following issue with how high the numerator is placed,
but only when using Palatino:

\setupbodyfont[palatino]
\starttext
\startformula
{3\over4}\quad {1\over2}
\stopformula
\stoptext

The 3 and the 1 sit quite high above the division line, esp. in
comparison with the gap below the line (above the 4 and the 2).

The place okay without the \setupbodyfont[palatino], so maybe it is
something incorrect in the font parameters?

The fonts are (from 'pdffonts'):

EUEJAR+TeXGyrePagella-Regular        CID Type 0C       Identity-H       yes yes yes     18  0
UPBTGS+TeXGyrePagellaMath-Regular    CID Type 0C       Identity-H       yes yes yes     19  0

And it is compiled with 2014.03.27 20:04 MKIV.

Is there a way to adjust the spacing, or an alternative workaround?

-Sanjoy