Unable to add image after posting

Using Known 0.9.9-a I wasn't able to add an image after posting.

<img width="600" alt="screen shot 2019-01-10 at 9 39 54 pm" src="https://user-images.githubusercontent.com/1266930/51010054-94bc0e80-1520-11e9-9344-8a7b4de2837b.png">

Now I could add one in the general body content, but that's missing the point.