Empty ManyToMany collection after refresh inside PostPersist event

[jsakars]

Using v2.7.3 of this library, I have a following case:

• I have an entity (e.g. Book) for which some DB value (number) is calculated using DB trigger => therefore I need to refresh the entity during PostPersist event in order to have the value available further down the path (e.g. to have it indexed in the Elasticsearch)
• I also have a ManyToMany Collection (e.g. Author) => for example one Author can have multiple Books and vice versa
• the problem is that after doing the $em->refresh($book) within PostPersist Listener -> $authors collection is empty even though there are actual entries of course stored in the database even

Of course, I do have several 3rd party libraries (Gedmo Translatable, Blamable etc.) used which might have something to do with this.

What could be the cause of this?