Duckling entity doesn't get validated in form when triggering form

Rasa Open Source
1

Hi! I have a bit of a problem, I have a form which extracts 2 dates with duckling. I use the validate_{slot} method to move the duckling time-dimesion to another slot. All this works unless a date is provided in the same message that triggers the form, if that is the case the validate function is never called. Why is that and how can i solve it?

Actions.py:

class ActionRequestVacation(FormAction):

    def name(self) -> Text:
        return "vacation_form"
    
    @staticmethod
    def required_slots(tracker: Tracker) -> List[Text]:

        return ["minDate", "maxDate"]

    def validate_minDate(self,value: Text,dispatcher: CollectingDispatcher,tracker: Tracker,domain: Dict[Text, Any],) -> Optional[Text]:
        print("validate_minDate")
        print(tracker.get_slot("time"))
     
        if type(tracker.get_slot("time")) is dict:
            return { 'minDate': tracker.get_slot("time")['from'] }
        else:
            return { 'minDate': tracker.get_slot("time") }

    def validate_maxDate(self,value: Text,dispatcher: CollectingDispatcher,tracker: Tracker,domain: Dict[Text, Any],) -> Optional[Text]:
        print("validate_maxDate")
        print(tracker.get_slot("time"))
        
        
        if type(tracker.get_slot("time")) is dict:
            return { 'maxDate': tracker.get_slot("time")['to'] }
        else:
             return { 'maxDate': tracker.get_slot("time")}

    def slot_mappings(self) -> Dict[Text, Union[Dict, List[Dict]]]:
        console.log("in slot_mappings")
        return {
            "minDate": [self.from_entity(entity="time")],
            "maxDate": [self.from_entity(entity="time")]
        }

    def submit(self,dispatcher: CollectingDispatcher,tracker: Tracker,domain: Dict[Text, Any],) -> List[Dict]:

        dispatcher.utter_message()
        return []

Thanks!