I’ve added HHH-16023 Open .zip. It contains the following test case org.hibernate.bugs.JPAUnitTestCase#HHH16023Test which can be used to reproduce the issue.

By default it uses the following version :

<dependency>
   <groupId>org.hibernate.orm</groupId>
   <artifactId>hibernate-core</artifactId>
   <version>6.1.6.Final</version>
</dependency>

When switching to :

<dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-core</artifactId>
   <version>5.6.14.Final</version>
</dependency>

and replacing all import javax.persistence by import jarkart.persistence the issue doesn’t occur anymore.