Nesting within a card returns an error due to undefined section

[knownasilya]

TypeError: Cannot read property 'isNested' of null
    at editor.js:1188
    at Editor.run (editor.js:755)
    at Editor.insertCard (editor.js:1176)
    at Class._addCard (component.js:351)
    at Class.addCard (component.js:113)
    at Backburner.join (backburner.js:567)
    at Function.run$1.join (ember-metal.js:4370)
    at action.js:388
    at exports.flaggedInstrument (ember-metal.js:3797)
    at EmptyObject.addCard (action.js:387)

My code looks something like this:

<section>
  <button onclick={{action editCard}} type='button'>Edit</button>
</section>
{{mobiledoc-editor}}

Full code is here https://github.com/knownasilya/ember-mobiledoc-grid/blob/master/addon/components/grid-cards-row/template.hbs

This is within a display card. The card is added to the editor, when I click inside the card and try to addCard inside this nested editor, it errors in this way.