could i use HalLedBlink () function repeatedly in the NwkState change cycle?

Hi  All 

         there is a ZED (battery power supply) .

         it should keep LED always blink  before it connects ZC。

         so i use  HalLedBlink () in the ZDO_STATE_CHANGE case  like below

uint16 zclTest_event_loop( uint8 task_id, uint16 events )
{
  afIncomingMSGPacket_t *MSGpkt;
  (void)task_id;  
  if ( events & SYS_EVENT_MSG )
  {
    while ( (MSGpkt = (afIncomingMSGPacket_t *)osal_msg_receive( zclConnectSwitch_TaskID )) )
    {
      switch ( MSGpkt->hdr.event )
      {
        case ZDO_STATE_CHANGE:
            zclTest_NwkState = (devStates_t)(MSGpkt->hdr.status);
            if(zclTest_NwkState == DEV_END_DEVICE )
            {
              HalLedSet ( HAL_LED_1 , HAL_LED_MODE_OFF);
            }else if(zclTest_NwkState == DEV_NWK_DISC )
            {
              HalLedBlink ( HAL_LED_1, 0,50,1000 );  
            }
        break;
     }
   }
  }
}

         and  My Zstack version is 1.2.2 which have a rejoin backoff  function .

        i  turn off the ZC and  restart it  again,  sometime  ZED rejoin success ,but sometimes  it could not rejoin the network , and the  HAL_LED_1 is always blink.

        although  ZC is OK

        so  is that using HalLedBlink () function  repeatedly  will caused the MCU shut down?

        or  there is some bug of the rejoin backoff  function ?

BR