font field empty when exporting "missing font"

[Stephan Tran]

Not sure if it's a Sketch thing or not, a bug report or a feature request!

Basically, when Sketch detects a missing font (https://www.dropbox.com/s/xsp38qnmgioji92/2018-05-25_11-08-23.jpeg?dl=0) , although it is indicated in the text style box, it does not export in the JSON file.

My end goal is to try to change the missing fonts so we can correct them in the JSON file then reimport the text styles again.

Thanks!