I don't quite know how image post's work . This editor needs an upgrade, i think :).
Testing a image upload. I don't know which link will show up as embedded picture!
<blockquote class="imgur-embed-pub" lang="en" data-id="j0zVfLo"><a href="//imgur.com/j0zVfLo">View post on imgur.com</a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>
[img][/img]
[Imgur]()