[NTG-context] ↦ in xits

Hi! I use $x↦2x$ in xits, and it prints x→2x instead of x↦2x. The same file works with latin modern. It seems that xits-math contains U+21A6 (↦) symbol (at least, kcharselect displays this character in xits-math font), so it should be related to some meta-information.