files:files property does not display the filename

1. install nuxeo
2. install JSF addon
3. in Studio / Configuration / External Templates, import the Default Nuxeo Platform Configuration one
4. customize the File document type and add files:files by dragging and dropping it.
5. do the same in the 3 layouts
6. synchronize the project server-side
7. create a File document with a content and some added files
8. head over to the Edit tab, only the filename of the content file is displayed not the ones from the attached files. (see contentAndFilesProblem.jpg)

Trying with only files:files and no file:content* does not change the behavior. (see *onlyFilesProblem.jpg)