Hey there,
We are using a plugin that loads file from S3, so it might be related. When we try to edit a picture, the thumbnail is never displayed, for example source is “http://thisisbbc.staging.wpengine.com/wp-admin/admin-ajax.php?action=imgedit-preview&_ajax_nonce=e0dd06368b&postid=1045&rand=56552” and that doesn’t seem to work.
Any clue?
Regards,
Bastien