The same issue was fixed in content-on-the-fly-prototype bundle on
EZP-27253, but it seems that the issue is not solved on Page edit.
This happens while using Firefox 52.0.2 (64bit).
Steps to reproduce
- create or edit a landing page
- drag an embed block into the page
- while adding an embed content, choose to create a new content
- choose the default "Article" content type
- choose a location
- the page with the New "Article" form is displayed
- scrolling on the form will be impossible
If the content type has many fields it will not be possible to reach them, because there's to way to scroll down.