Persistent Collection is empty

When enhancement-as-proxy is enabled (hibernate.bytecode.allow_enhancement_as_proxy set to true) with bytecode enhancement for lazy initialization, a lazy @OneToMany (or @ElementCollection) is initialized but remains empty when it has elements.

It only happens when the entity is already present in the persistence context, thus returned as-is by DefaultLoadEventListener.doLoad:518.

It's present in the persistent context because another Entity referencing it through a lazy @OneToOne with @LazyToOne(LazyToOneOption.NO_PROXY) has been loaded.

EDIT: I’m currently not able to reproduce this issue outside of the real Spring app.