Bug confirmed on Hibernate 5.0.5.Final. Test case uploaded hhh-5855-master-hibernate-5.0.5.zip

Updated test case can also be found on Github: https://github.com/mpostelnicu/hhh-5855
Travis CI test case failing https://travis-ci.org/mpostelnicu/hhh-5855

This issue has been confirmed by Gail Badner and Mihalcea Vlad, it affects the latest release of Hibernate and it makes OneToMany List relationships unusable (at least not in the format described by the bug, which we find is quite common).