about example of two device,i receive one device data only,plz help me

[tomuGo]

i see the example of two device,but id did not happend.
here is my code,thanks.

    def conn_blue_devices(self,addresses):
        tasks = []
        for i,address in enumerate(addresses):
            if i == 0:
                task = asyncio.create_task(self.conn_blue_device(address))
                tasks.append(task)
            elif i == 1:
                task2 = asyncio.create_task(self.conn_blue_device2(address))
                tasks.append(task2)
        asyncio.gather(*tasks)

    async def conn_blue_device(self, address):
        async with BleakClient(address, loop=self.main_window.loop) as self.ble_client:
            x = await self.ble_client.is_connected()
            logger.debug("Connected: {0}".format(x))
            self.main_window.label_status_value.setText("已连接")
            self.main_window.button_device_connect.setText("断开")
            self.main_window.connect_setting_log.appendPlainText("connect success")
            self.main_window.button_device_scan.setDisabled(True)
            print("ok"+address)
            await self.ble_client.start_notify(ble_service_uuid, self.notification_handler)
            while 1:
                await asyncio.sleep(0.001)

    async def conn_blue_device2(self, address):
        async with BleakClient(address, loop=self.main_window.loop) as self.ble_client2:
            x = await self.ble_client2.is_connected()
            logger.debug("Connected: {0}".format(x))
            self.main_window.label_status_value.setText("已连接")
            self.main_window.button_device_connect.setText("断开")
            self.main_window.connect_setting_log.appendPlainText("connect success")
            self.main_window.button_device_scan.setDisabled(True)
            print("ok "+address)
            await self.ble_client2.start_notify(ble_service_uuid, self.notification_handler2)
            while 1:
                await asyncio.sleep(0.001)

    def notification_handler(self, sender, data):
        if self.flag:
            print("blue 1")
            data_queue = DataQueue([None] * 525)
            decode_queue = DecodeQueue()
            try:
                for b in data:
                    data_queue.en_queue(b)
                decode_queue.decode_data(data_queue, self.main_window)
            except GeneratorExit:
                print("GeneratorExit")

    def notification_handler2(self, sender, data):
        if self.flag:
            print("blue 2")
            data_queue = DataQueue([None] * 525)
            decode_queue = DecodeQueue()
            try:
                for b in data:
                    data_queue.en_queue(b)
                decode_queue.decode_data(data_queue, self.main_window)
            except GeneratorExit:
                print("GeneratorExit")`

[tomuGo]

At the beginning，i can receieve two device data,but a few seconds later,there is only one device data i can receieve.

[tomuGo]

i found ,the later connected device will work a few second ,first device worked well.