`modal_after` caption markdown headers not working

[7yl4r]

example:

## Seaside sparrows (*Ammodramus maritimus*)

Seaside sparrows are the most saltmarsh-dependent songbird species in North America. They are considered a species of conservation concern across their range due to coastal land loss. Louisiana populations are year-round saltmarsh residents, where they eat seeds, insects, and even small crabs. They nest in *Spartina alterniflora* and other marsh grasses, and their nests sometimes flood during high spring tides or storm events. 

Should render with the header, but:

[7yl4r]

As a temporary workaround, html headers in the markdown files should work. Although I haven't tested this.

<h2>Seaside sparrows (*Ammodramus maritimus*)</h2>