It recently happened to me that the plugin would not render some equations involving underscores, probably due to a conflict with GitHub's markdown renderer.
e.g., expressions of the form $\bar{x}_{i'}$ would not be rendered in GitHub issues, while $x_i$ would.
It recently happened to me that the plugin would not render some equations involving underscores, probably due to a conflict with GitHub's markdown renderer.
e.g., expressions of the form
$\bar{x}_{i'}$
would not be rendered in GitHub issues, while$x_i$
would.I found out that backslashing the troublesome underscores fixed the problem in this case, as it was suggested for related problems in https://github.com/mathjax/MathJax/issues/329
e.g.
$\bar{x}\_{i'}$