\begin{aligned} not being rendered

For some reason, \begin{aligned} statements like the following aren’t being rendered in my markdown documents using Hugo:

$$
\begin{aligned}
	\bar{u} - \bar{v} &= \bar{u} - (2\mu - \bar{u}) \\
	&= \bar{u} - 2\mu + \bar{u} \\
	&= 2\bar{u} - 2\mu \\
	&= 2(\bar{u} - \mu)
\end{aligned}
$$

Everything else renders just fine.

I have the following config:

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.css" integrity="sha384-zB1R0rpPzHqg7Kpt0Aljp8JPLqbXI3bhnPWROx27a9N0Ll6ZP/+DiW/UqRcLbRjq" crossorigin="anonymous">
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.js" integrity="sha384-y23I5Q6l+B6vatafAwxRu/0oK/79VlbSz7Q9aiSZUvyWYIYsd+qj+o24G5ZU2zJz" crossorigin="anonymous"></script>
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/contrib/auto-render.min.js" integrity="sha384-kWPLUVMOks5AQFrykwIup5lo0m3iMkkHrD0uJ4H5cjeGihAutqP0yW0J6dpFiVkI" crossorigin="anonymous"></script>
<script>
    document.addEventListener("DOMContentLoaded", function() {
    renderMathInElement(document.body,
        {
            delimiters: [
            {left: "$$", right: "$$", display:true},
            {left: "$", right: "$", display:false},
            {left: "\\(", right: "\\)", display: false},
            {left: "\\[", right: "\\]", display: true}
            ],
            macros: {
                "\\R": "\\mathbb{R}",
                "\\B": "\\mathbb{B}",
                "\\summation": "\\sum\\nolimits_{#1}^{#2}",
                "\\product": "\\prod\\limits_{#1}^{#2}",
                "\\E": "\\text{E}",
                "\\bias": "\\text{bias}",
                "\\var": "\\text{var}",
                "\\step": "\\text{step}",
                "\\span": "\\text{span}",
                "\\P": "\\text{P}",
                "\\pmf": "\\text{pmf}",
                "\\T": "\\text{T}",
                "\\infinity": "\\infty",
                "\\then": "\\implies",
                "\\cross": "\\times",
                "\\approaches": "\\rightarrow",
                "\\yhat": "\\hat{y}"
            }
        });
        });
</script>

[bobbywlindsey]

I think this is really just a problem with how Hugo renders markdown into HTML. I haven’t been able to figure it out, so switching back to MathJax for now. But I’ll be closing this issue since the bug is not with Katex.

[bobbywlindsey]

Even with four backslashes like you suggested:

$$
\begin{aligned}
	\bar{u} - \bar{v} &= \bar{u} - (2\mu - \bar{u}) \\\\
	&= \bar{u} - 2\mu + \bar{u} \\\\
	&= 2\bar{u} - 2\mu \\\\
	&= 2(\bar{u} - \mu)
\end{aligned}
$$

I still get this result:

 \begin{aligned} \bar{u} - \bar{v} &= \bar{u} - (2\mu - \bar{u}) \\
&= \bar{u} - 2\mu + \bar{u} \\
&= 2\bar{u} - 2\mu \\
&= 2(\bar{u} - \mu) \end{aligned}