Your contribution cannot be approved because it does not follow the Utopian Rules.

To support both Markdown and HTML in the same text editor, it requires some special handing/compromise with the syntax. Especially your HTML (div) element is overlaps the markdown elements. I would categorize this as a 'feature' rather than a bug.
For example, there are issues in Markdown when you want to insert a blank new line after code block, the workaround is to add <BR /> after triple escapes ```

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