[NTG-context] Table of Contents empty for unknown reason

[Joel]

I need to display a table of contents, but only displaying chapters.

Here is my minimum working example:
\starttext
    \startfrontmatter
        \startchapter[title={Contents}]
            \placelist[chapter]
        \stopchapter
        \completecontent
    \stopfrontmatter
    \startbodymatter
    \startchapter[title={Title 1}]
                \input knuth
        \stopchapter
        \stopbodymatter

\stoptext

For reasons I don't understand, both  \placelist[chapter] and \completecontent display the title, but are otherwise empty of contents. I believe the code was working before an update. I used ConTeXt live though and confirmed this code even doesn't work there.
Why isn't it rendering the table of contents?
--Joel

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