I posted a detailed description here
A test showing this issue is here
I am trying to get lifecycle related callbacks on Embeddable beans using Hibernate 5.4.10.Final. I have been able to locate a bug seemingly related to this issue . It states the problem has been fixed in earlier Hibernate versions but I am definitely still seeing the issue it in collections of Embeddable.
It is not clear what events could be supported, because an update for example causes a remove and add, but the test attached shows that PostLoad and PrePersist are not working.