Cannot add math in figcaption

[Serenade600]

I would like to add math in figcaption like

# Current issue

![center width:10cm](./img/explosion_data.png)
<figcaption>
heating mixture of $\ce{H2}$、$\ce{O2}$、$\ce{H2O}$ in closed vessel
</figcaption>

heating mixture of $\ce{H2}$、$\ce{O2}$、$\ce{H2O}$ in closed vessel

but only get
.

It seems the math didn't rendered in figcaption. Is that a bug or I should set someting to make math work?

[Serenade600]

I'm using marp in vscode.

[yhatt]

Check out #152. HTML in CommonMark requires putting blank lines around Markdown contents.

# Current issue

![center width:10cm](./img/explosion_data.png)

<figcaption>

heating mixture of $\ce{H2}$、$\ce{O2}$、$\ce{H2O}$ in closed vessel

</figcaption>

heating mixture of $\ce{H2}$、$\ce{O2}$、$\ce{H2O}$ in closed vessel