Markus Jessenitschnig For that particular test case, calling Session#close there does not make a lot of sense.

[This article](http://in.relation.to/2018/06/04/best-way-write-hibernate-orm-issue-test-case/) explains how to create a test case for Hibernate issues and provide it via a Pull Request.

If you can create a test case that follows a valid flow of operations and the issue can be replicated, we can then start investigating it and provide a fix.