Your explanation was a little sketchy, but it seams that you are using a custom Upload Image field, and not the art_image_intro field.
Anyway, I found some issues with saving images in cases when there still does not exist the destination "root" folder for images, as for example /images/news/ in your case. However, if the folder already exist, and is (for consistency reasons) filled with the final / (i.e. /images/news/), I found it works fine. I would also like to mention that Advanced Mode is set to Yes (JSON-Formatted value) and storage is set to JSON | Article | image.