Hello
I got with EB a weird bug where I select a picture on the "add media" menu, on the editor, and then I can't select any size for it, and if I insert it, it doesn't display.
After further investigations, I finally found what's the root cause. If you do select a cover for your article, then 100% of the time, adding a media will not work after. It's easy to reproduce, even on the demo website.
Steps to reproduce :
1) Start writing a new entry
2) Select a cover for your article.
3) Once it's selected, click on "add media"
4) Select any picture, anywhere. On the right, where the list of available sizes, image popup/caption/link options should appears, there is nothing.
5) Insert the picture. Nothing appears on the editor.
While it's not a very annoying bug, I wanted to report it

GL for the next fix of EB. I hope you'll fix
the block image issue on it, this problem is currently what makes me not using the composer