Hi Mark,
Thank you for the update.
We have checked the provided document. It contains textbox, checkbox content control.
Currently, document editor doesn’t provide complete support for content controls as like in MS Word. We have logged this as a feature request. we will include this in any of our upcoming releases. You can track the feature status from below link.
we will update the status of feedback link once it is taken for implementation. We will update, once implemented.
But we will parse and layout the paragraphs of content control and inline content control. Hence the plain text is rendered.
Regards,
Harini C