ID3 Tag "Label" in Prime Engine not import correctly


I have an issue with the “label” tag that does not seem to import correctly in Prime Engine. It’s correctly written in the tag “label” but it won’t display in the library.

If I input it manually in Prime Engine, it seem to be stored in the library info, not written on the id3 tag.

Do you have the same issue? Is there a way to make this work?