Box allows to load more than one file but Nuxeo saves only one

With Nuxeo running with Mongo and Redis

When creating a document with Live Connect, I want to link a document stored in my Box. The Box popup offers me the possibility to upload more than one document. After validating the selection, the nuxeo document creation form lists my two documents, but when I save, I keep only one.

Expected behavior : There should be a warning message indicating you can load only one.