Could you give us more information about the stack traces of these calls (especially, I'd like to see where they come from from an Hibernate POV):

When debugging the error I noticed that oracle.jdbc.driver.AutoKeyInfo#getReturnParamTypeCode tries to find "id" (with quotes) in an array of columns without quotes oracle.jdbc.driver.AutoKeyInfo#tableColumnNames. The array must be retrieved directly from database by the driver itself (to prove that I added a new column Hibernate is not aware about and that column was included into the array) and the quoted column must be coming from Hibernate.