Query with new collection operators is not working on a nested query

[co-sic]

Describe the bug

class Publisher {
   @OneToOne()
   owner: Author;
}

class Author {
   @OneToMany(() => Book, (book) => book.author)
   books = new Collection<Book>(this);
}

class Book {
   @Property()
   title: string;

   @ManyToOne()
   author: Author;
}

em.find(Publisher, {
   owner: {
      books: {
         $some: {
            title: "Book 2",
         },
      },
    },
});

This query gives the following Error: Error: Trying to join 'books', but 'books' is not a defined relation on Publisher..
If i do the query directly on the Author with the some condition on books, it works fine.

Reproduction

https://github.com/co-sic/node-mikro-orm-playground

What driver are you using?

@mikro-orm/postgresql

MikroORM version

6.0.1

Node.js version

20.9.0

Operating system

No response

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• The provided reproduction is a minimal reproducible example of the bug.

[co-sic]

Thanks!