Memoization Policy after Form Policy "Fail"

Rasa Open Source
6 
## New Story
* slot{"department_id":NN}
    - slot{"department_id":NN}
    - utter_ask_fiscal_code
    - form_name
    - form{"name":"form_name"}
    - slot{"requested_slot":"fiscal_code"}
* form: fiscal_code{"fiscal_code":"XXXXXXXXXXX"}
    - slot{"fiscal_code":"XXXXXXXXXXX"}
    - form: form_name
    - slot{"fiscal_code":"XXXXXXXXXXX"}
    - form{"name":null}
    - slot{"requested_slot":null}
    - form: utter_ask_more
* intent_two
    - utter_to_intent_two

I tried with the story above but the result is the same, the action_listen after utter_ask_more is always predicted using TedPolicy and not MemoizationPolicy