Merge detach entity with null values

[antoinechamot]

Hi,
I have a detached entity with a String value. If the value in my database is currently filled with for example "test" and my detached entity is set to "updated_test" when I call a merge() it behaves as I expect and updates the value in the database to updated_test.
However, if the value in the detached entity is set to null and the database is currently "test" the value in the database is not updated on merge() call

Why this behavior in Quarkus ?

NB: The entity i merge extends another entity with the strategy @Inheritance(strategy = InheritanceType.JOINED)