Using iframes in an Ember project


I am exploring using iframes in my Ember project, and have run into a problem. Dynamic Handlebars variables inserted into an iframe seem unable to update:

Cannot perform operations on a Metamorph that is not in the DOM. .

If this is not possible, what’s a good approach for rendering dynamic content in an iframe in Ember?

For some context, I’m building something like MailChimp’s template designer, using iframes for CSS isolation.