Missing symbols

Hi,

I noticed that in the new updated version, sometimes, the fraction divisor (using \dfrac) does not appear. This is completely random, on some pages it appears, and on others, it disappears. Sometimes, it appears on a pc, but not on a mobile device. I am not sure of the reason, but I hope you look into this.

Thanks for all the hard work you guys put into this plugin, it is truly amazing!