This is a regression of HHH-8354, if that code ever worked. There are no tests of the dirty tracking "in operation", just some tests of the enhanced bytecode.
I also did a usage search for org.hibernate.engine.spi.PersistentAttributeInterceptor and found that:
there is no non-test implementations of this method, and
no code ever tries to inject the interceptor into the enhanced entity.
, did this ever work? Or , did you introduce a regression here when you refactored this code?
Any additional details to add?