A /* */ comment prevents a jsx element from being recognized

[mgedmin]

I have code like this:

const renderThing = props => (
  /* Render a thing */
  <div>
    <span>
      {props.a_thing}
    </span>
  </div>
);

The <div> does not get highlighted as JSX (it's showing as jsIdentifier), the <span>...</span> is all right, and the </div> is treated as an < operator followed by an unterminated regexp literal /div>, which then renders the ) on the next line as an error (jsRegexpError).

Removing the /* Render a thing */ comment fixes highlighting. Replacing it with a // Render a thing comment also fixes highlighting.

I'm not sufficiently familiar with Vim syntax rules to figure out why this happens or how to fix it.