@Manuel Dominguez Sarmiento: I ran into a similar issue recently. While it resolved after upgrading JDBC driver to 12.1 for 1 use case. I resurfaced missing updates issue again (Hibernate should have thrown StaleStateException but it did not)

My setup -
OJDBC Driver : 12.1.0.2
Database Version : 12.1

have you seen anything like this?