Thanks for the workaround! This unfortunately doesn’t suite our coding guidelines.

What I did yesterday was trying to reproduce this with hibernate again which was successful!

https://github.com/jan-schumacher/KotlinJpaInheritanceIssue/tree/main/hibernate-orm-6

Feel free to add this as a Bug Testcase to the issue.

https://github.com/jan-schumacher/KotlinJpaInheritanceIssue/blob/main/hibernate-orm-6/src/test/kotlin/bugs/JPAUnitTestCase.kt

This testcase proves that hibernate already doesn’t load the entity correct.