There is a bug with escape when canceling the image uploader when editing a post inline (i.e. with the 2k edit posts privilege)
Browser: Chrome 50.0.xxx, did not test other browsers
- Edit any question.
- Click on the image icon in the toolbar.
- Hit escape key on your keyboard.
The image dialog will close with the question still editable
The image dialog remains open and the question is no longer editable. If you hit the escape key a second time, the image dialog hides.