In a quick test, this breaks, i.e., doesn’t show the following headings in the Outline tab:
> comment
> $$
\begin{vmatrix}a & b\\ c & d \end{vmatrix}=ad-bc
$$
The headings are fine using this, but you end up with an unwanted > in the math block.
> comment
> $$
\begin{vmatrix}a & b\\ c & d \end{vmatrix}=ad-bc
> $$
These seem working and the headings are fine:
> comment $$\begin{vmatrix}a & b\\ c & d \end{vmatrix}=ad-bc$$
> comment
> $$
\begin{vmatrix}a & b\\ c & d \end{vmatrix}=ad-bc$$
Related: