I add metadata to raw files in Bridge (version 15.1.1.729), and then export them to jpeg. The problem is that if I make a change to the description metadata item in the jpeg file, using Bridge, other applications (including Preview on MacOS) still show the original description. To get it right I have to make the change on the raw files, delete the jpeg files, and then re-export them. This adds significant time to my workflow.
Using the Jimpl.com metadata viewer I can see that the old description remains in the legacy IIM Caption-Abstract field, while the new one shows up in XMP description. The IPTC doc says that these two map to each other.
The attached jpeg shows the edited description (T. Wicklund #22) in XMP description and the original description (Tim Wicklund #22) in IIM Caption-Abstract. I need to make sure the original description is removed and won't show up again.
Since I cannot alter what is in Caption-Abstract (except by deleting and re-exporting), I can't set a revised description on a jpeg that will show up in the other applications! Sure looks like a defect to me.