customHTMLRenderer sucks in other html after switch from wysiwyg

[mirkin]

Outline

Keep it simple and add a div to your markdown and add block renderer. When you switch back from wysiwyg it starts to take the other markdown and put it into the div.

To Reproduce

<div></div>

stuff

more stuff

div(node) {
                            return [{
                                    type: 'openTag',
                                    tagName: 'div',
                                    outerNewLine: true,
                                    attributes: node.attrs
                                },
                                {
                                    type: 'html',
                                    content: node.childrenHTML
                                },
                                {
                                    type: 'closeTag',
                                    tagName: 'div',
                                    outerNewLine: true
                                },
                            ];

Expected behavior

switch from wysiwyg and back and no change but it does changer and the div gobbles up the rest of the page.

<div></div>stuff

more stuff

Then

<div>stuff</div>more stuff

Then

<div>stuff more stuff</div>