Thank you @jonathan 🙂
As you said, now the update button disappeared, but it doesn’t solve my problem about displaying the file uploader when the post is not published yet.
By the way, now when I publish my post for the first time (whithout file attached because the field wasn’t displayed), and then go back on my post to attach a file and click on my “Save” button, the file selected doesn’t seem to be uploaded, because when I go back to my post edit page, the field is empty.
