Hi,
to me this seems wrong:

skipping the inteceptor if the entity is already dirty seem legit, but this way the interceptor will never be invoked, denying the opportunity to further modify the instance or simply intercept the update.

Please rollback the commit https://github.com/hibernate/hibernate-orm/commit/9b00aaf9a55f9879a512b34c13dd25425264494b

Cheers,