Cloning or populating lazy-loaded entity with nullified id has unexpected behavior

[AntoineRoue]

Bug Report

Q	A
BC Break	no
Version	3.1.2

Summary

Cloning a lazy-loaded entity or populating it after setting its id to null does not work properly.

Current behavior

When we do $entity->getEntityB(), B entity is lazy loaded. Then, if we set B entity's id to null before to populate it, and then we populate it, it populates the first B entity of the database, the one inserted first in the database.

If we clone a lazy loaded entity, persist and flush it, properties are nullified.

How to reproduce

I created a minimal repository whith these bugs here : https://github.com/AntoineRoue/doctrine-test

Expected behavior

In my opinion, a lazy-loaded entity should be populated just before its id is set to null or it's cloned.