Twilio Return gathering after client press star

I'm trying to create a fallback gathering if the interpreter hangup from the conference while the client is still on the line, I have to return the gathering to the client to ask him if he wants another interpreter or disconnect

everything work perfect but, when the client pressed star, the gather said the first part of the word only, and then the call disconnected

def handle_incoming_call(self, call_sid, from_number, language_code):
        try:
            with transaction.atomic():
                next_interpreter = CallSelector.get_next_interpreter(language_code)

                conference_name = f"conferenceـ{call_sid}"
                conference = CallSelector.create_conference(
                    language=next_interpreter.language,
                    interpreter=next_interpreter.interpreter,
                    conference_name=conference_name,
                )

                response = VoiceResponse()
                response.say("Please wait while we connect you with an interpreter")
                dial = Dial(
                    hangup_on_star=True,
                    action=f"{settings.BASE_URL}/api/calls/webhook/interpreter_leave/{conference.conference_id}/",
                    timeout=30,
                )
                dial.conference(
                    conference_name,
                    start_conference_on_enter=True,
                    end_conference_on_exit=False,
                    # record=True,
                    # recording_status_callback=f"{settings.BASE_URL}/api/calls/webhook/recording/{conference.conference_id}/",
                    status_callback=f"{settings.BASE_URL}/api/calls/webhook/conference-status/{conference.conference_id}/",
                    status_callback_event="start end join leave announcement",
                    status_callback_method="POST",
                    beep=True,
                    participant_label="client",
                )
                response.append(dial)

                self._add_client_to_conference(conference, from_number, call_sid),
                self._call_interpreter(conference, next_interpreter.interpreter),

                return response
        except Exception as e:
            logger.error(f"Call handling failed: {str(e)}", exc_info=True)
            return self._generate_no_interpreter_twiml()

And here is the callback interpreter_leave

def handel_interpreter_leave(self, conference_id: str):
        try:

            print("Interpreter leave handling started")
            conference = CallSelector.get_conference_by_conference_id(conference_id)
            response = VoiceResponse()
            gather = Gather(
                num_digits=1,
                action=f"{settings.BASE_URL}/api/calls/webhook/client_choice/{conference_id}/",
                method="POST",
                timeout=10,
                input="dtmf",
            )
            gather.say("Press 1 to connect with a new interpreter, or press 2 to end the call.")
            response.append(gather)
            return response
        except Exception as e:
            logger.error(f"Interpreter leave handling failed: {str(e)}", exc_info=True)
            raise

Before the Action call, I have a function called after the interpreter leaves to tell the client to pressthe star

def handle_interpreter_hangup(self, conference_id: str, sid: str):
        try:
            print("Interpreter hangup handling started")
            conference = CallSelector.get_conference_by_conference_id(conference_id)
            self.client.conferences.get(conference.conference_sid).update(
                announce_url=f"{settings.BASE_URL}/api/calls/webhook/interpreter_leave_redirect/{conference_id}/"
            )
        except Exception as e:
            logger.error(f"Interpreter hangup handling failed: {str(e)}", exc_info=True)
            raise

everything works as expected but when its come to gathering the twiml says "Press 1 to"

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