Xaringan: Math renders as inline code in footnote class

Using the default Xaringan CSS, if $math$ is placed in a footnote, it appears to be rendered as inline code, rather than rendering as math. I was not able to find information about this - is this just a natural limitation in Xaringan or remark.js? Or perhaps I am doing something wrong?

See basic example below:

# A Test

- This is a test<sup>1</sup>

.footnote[<sup>1</sup> This includes $\delta+\frac{2}{3}$ math.]

This will render the math between the $$ as if it were between backticks.