We just released the first maintenance release of Hibernate ORM 5.4.
It is designed to be a drop in replacement for ORM 5.4.0.
We fixed several regressions and improved the documentation. Some regressions are specific to 5.4 but some others are also affecting older versions.
All details are available and up to date on the dedicated page on hibernate.org.
We will release regular maintenance releases thereafter but the main focus of development is now Hibernate ORM 6.