Another "multivalued paths are only allowed" problem with JPA query methods

[ML-Marco]

@Entity
public class MyEntity {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@ManyToMany
	@JoinTable(name = "entity_stuff_join_table", joinColumns = {@JoinColumn(name = "fk_stuff")}, inverseJoinColumns = @JoinColumn(name = "fk_my_entity"))
	private List<Stuff> stuffList;

@Repository
public interface MyEntityRepository extends JpaRepository<MyEntity, Long> {

	void existsByStuffList(List<Stuff> stuffList);
	void existsByStuffList(Stuff stuff);
}

When calling either method this exception is thrown:

Multivalued paths are only allowed for the 'member of' operator; Bad SELECT m.id id FROM MyEntity m WHERE m.stuffList = :stuff grammar [JPQL]

The second method worked with Spring 6. I didn't test the first one but would assume that it worked too.

Edit: I just confirmed that both methods worked in Spring Data JPA 3.5.8. Make sure to call the first method with an immutable list of size one.