Hi Trevor and Bill,
The mentioned issues are happening because of the browser's behavior when handling an editable iframe element.
Empty elements without any text or an inside, cannot be rendered as correct ones and due to that they are not selectable. You can test this scenario with the attached sample HTML page, in which a simple editable iframe is configured.
The last <br>, which is not removable happens only under chrome, which appears to be because the browser's logic breaks when there is no text node between the element and the <br>. For example you can test the scenario with these lines of HTML code and see the differences:
Due to the reason that this is related to the browsers' implementation, we are unable to control or fix such issues.
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