Hibernate inserts data in the wrong columns for list of records with @OrderColumn

It has been three months and the user has not provided an isolated reproducer. You have done more than enough here, and you should close the issue (up to you what to do with the test you wrote).

You don’t really need to concern yourself with the test framework, that’s only the infrastructure to provide you with a session, in this case inside a transaction.

So really the only important issue is if i got the gist of your problem right.

I reproduced the bug with all versions I mentioned (6.4.10, 6.5.3, 6.6.2) by using the correct version of Spring Boot. But I never tried in a pure Hibernate environment without Spring in the way. I need some time to understand how the Hibernate test framework works, I looked at the simplified test and I didn’t understand it at first glance.

I was somewhat mislead by the indicated affected versions that stated 6.6.2 as affected; I’ve now also tested it on the actual hibernate version that Spring Boot 3.3.6 depends on (6.5.3), but it still doesn’t fail.

Unless You can provide me with additional feedback, I’m guessing that this could be a problem in Spring Boot rather than Hibernate itself.

I’ve added a pure Hibernate simplified test here, and tried it out on main and 6.6.2 and in both those cases on mariadb as well as h2, but cannot get it to fail. Could you have a look in case I missed something in the test?