Not all File uploads are image_field uploads. If a File was uploaded on a Doctype with image_field specified, that do not mean that File was uploaded for the image_field
Reload the File document before returning so that frappe-js sets the correct file_urls in Attach & Attach Image fields
Two issues are being fixed here:
image_fielduploads. If a File was uploaded on a Doctype withimage_fieldspecified, that do not mean that File was uploaded for theimage_fieldAttach&Attach Imagefields