Actually, this bug will appear in all versions as I know. I want to use \small to adjust the mathjax font-size like this:
Normal：\(\overline{X} \)
use \small：\(\small \overline{X} \)
use \scriptsize：\(\scriptsize \overline{X} \)
use \tiny：\(\tiny \overline{X} \)
this is the real effect
As we see, when I use \small and \tiny it will lose the bar in the top. Please fix.
ps: this bug will not appear in AnkiDroid but just in Windows Anki.
