Grails 2.0.1 only fetching first element from eager collection

The attached application contains an n:m relation between Authors and Books.
Authors are fetched eagerly when loading a book.
Bootstrap connects one book ("Book1") with two Authors ("Author1" and "Author2").
In the integration test "BookTests" the expression

Book.findByTitle('Book1').authors

returns only "Author1" but not "Author2".
The reason seems to be that the finderBy leads to a SQL statement that contains the join between books and author as needed for eager fetching but also a "limit"-expression.
This seems to restrict the results that are fetched.