Cannot retrieve child headers

[Foxtrek64]

I have created a file called sample.md to demonstrate this issue. Contents are as follows:

---
Layout: _DocsLayout
---
# Title

Some text

## Section 1

Section 1 text

## Section 2

Section 2 text

In the _DocsLayout page, I specify a sidebar which holds this content:

@{
    var headings = Document.GetDocumentList(Statiq.Html.HtmlKeys.Headings);
}
@* snip *@
<div class="box">
    <ul>
        @foreach (IDocument heading in headings)
        {
            <li>@(await heading.GetContentStringAsync())</li>
            <ul>
                @{
                    var documentListCount = heading.GetDocumentList(Statiq.Html.HtmlKeys.Headings).Count;
                    var childCount = heading.GetChildren().Count;
                    <li>Document List Count: @documentListCount</li>
                    <li>Child Count: @childCount</li>
                }
            </ul>
        }
    </ul>
</div>

When I render this page, the box appears as this:

It seems the engine correctly identifies <h1>Title</h1> as being a header element, but this is where it stops. The headings document on the website suggests that child headings are stored as children. Is the system not properly detecting H2 elements as being headers or am I misunderstanding the website as far as how to get child elements? I've been experimenting with this for a bit trying to find a way to get to them but with no luck.

Edit: I have manually pushed to GitHub Pages if you wish to see an example: https://luzfaltex.github.io/policies/terms
https://github.com/LuzFaltex/luzfaltex.github.io/blob/e2288dd06d71ec176570ffde7ced7660637acf5d/input/Shared/_tocList.cshtml#L11-L34

[Foxtrek64]

Found the fix for this. In my settings, set GatherHeadingsLevel to how many layers deep you want. In my case, I chose 3. It now detects child headings properly on all Markdown pages. On HTML pages, it does not appear to detect any headings, so I may need to do some tinkering here.

[daveaglick]

Just commented in the other discussion that should help clarify some of this.

[Foxtrek64]

Tagging #58 for others who find this later.