I am using Emacs 24.5 (stock Debian jessie) with a UHD display. I am over 50 and I need a large font. I have found a font that works well, but when I set the font using
(set-face-attribute 'default nil :font "Droid Sans Mono" :height 130)
it breaks the rendering of Unicode character U+2099 (Latin subscript small letter N). The glyph renders not as a subscript n but as a superscript theta.
I have verified with
emacs -q that the stock distribution renders the subscript small N correctly with the default font, and that the single command above is enough to break the small N. My other unicode subscripts, Greek letters, and math symbols seem to render correctly.
How can I change the main font without breaking the mapping of the subscript small N?