Steps to reproduce:
* Create an image field and add an image
* Click on edit and “Edit image” -> The image editor appears.
* Try to click and drag on the image.
Expected result:
* A rectangle appears in order to allow image cropping.
Actual result:
* The Image is dragged (standard browser behavior.)
Workaround:
* Click on the cancel button, then edit again. Cropping is now possible.
The cause probably is the JS error:
ReferenceError: imageEdit is not defined
…/wp-includes/js/tinymce/tinymce.min.js?ver=4021-20140412
Line 2
In WordPress without ACF “edit image” within the media dialog now opens as AJAX (not ?post=…&action=edit&image-editor directly), so maybe the JS loading order isn’t correct.