I can confirm this behaviour in Hibernate 6.2.3. This is happening with Date in H2 as well.

With PostgreSQL 15.3 it happens with Double and Date.

I created 2 test cases. 1 for H2 and 1 for PostgreSQL. I wasn’t sure how to attach it, so I created a pull request for the test case template repo:

https://github.com/hibernate/hibernate-test-case-templates/pull/270