MultiLingualField lijkt zoek functie in admin te breken

Bijvoorbeeld: Url:http://localhost:8000/admin/events/event/?q=EOS Error:Cannot resolve keyword 'title' into field. Choices are: cancel_deadline, cost, description_en, description_nl, end, id, location_en, location_nl, map_location, max_participants, no_registration_message_en, no_registration_message_nl, organiser, organiser_id, price, published, registration, registration_end, registration_start, registrationinformationfield, start, title_en, title_nl