EndDevice after many rejections can't connect to network ?

No, I don't modify Z-Stack !

  // Connection events. Checking is we connected ?
  if ( events & GENERICAPP_CONNECTION_EVT )
  {
    // Checking if device is connected
    // Testing is answer ?
    if(!(GenericApp_NwkState == DEV_END_DEVICE || GenericApp_NwkState == DEV_END_DEVICE_UNAUTH ||
         GenericApp_NwkState == DEV_NWK_JOINING || GenericApp_NwkState == DEV_NWK_REJOIN) || 
        (status.sended == true && status.answer == false))
    {
      status.sended = false;
      ZDOInitDevice( 0 );
    }
    
    // Set timer for message
    osal_start_reload_timer( GenericApp_TaskID,GENERICAPP_CONNECTION_EVT,connectionDelay );
    
    // return unprocessed events
    return (events ^ GENERICAPP_CONNECTION_EVT);
  }

That code is restarting EndDevice ...

I put this changes to ...

The EndDevice is constantly trying to connect to the network, if it fails to do so, within 10 seconds should be reconnected to the network. Thus the device can be in the status DEV_HOLD. Because coordinator may reject the request to connect to the network. I need to make in 10 seconds reconnect to the network if the device is not registered. How do I make this?

I know it because I have catched it.

If I write following code:

  // Connection events. Checking is we connected ?
  if ( events & GENERICAPP_CONNECTION_EVT )
  {
    // Checking if device is connected
    // Testing is answer ?
    if(!(GenericApp_NwkState == DEV_END_DEVICE || GenericApp_NwkState == DEV_END_DEVICE_UNAUTH ||
         GenericApp_NwkState == DEV_NWK_JOINING || GenericApp_NwkState == DEV_NWK_REJOIN) || 
        (status.sended == true && status.answer == false))
    {
      status.sended = false;
      //ZDOInitDevice( 0 );
    }
    
    // Set timer for message
    osal_start_reload_timer( GenericApp_TaskID,GENERICAPP_CONNECTION_EVT,connectionDelay );
    
    // return unprocessed events
    return (events ^ GENERICAPP_CONNECTION_EVT);
  }

After recieving the rejection from Coordinator, End Device isn't trying to connect and I don't see anything in that channel by a sniffer. May be need to set correct the rejoining timeout in this project ?

But after restart system:

Again, I see packages.

But if the EndDevice is recieved the Leave response from the Coordinator ...   the packets has left.

So how do I must restart ZDO_Task ? How to do it correctly ?

I am confused by your questions. Can you describe again step by step about what you want to do? According to my understanding, ZED always send beacon request to try to join network when it is not connected to any network. I have to understand the scenerio so I can give you advise. 

Look ... For my program, I use the example of the Z-Stack Mesh 1.0.0 project name GenericApp. So coordinator for some reason lost communication with the device, but after rebooting the device is functioning properly. And if the connection was lost, it will no longer be restored only after a reboot. For this reason, I do side Device Features 20 timeout after which checks its status (the device is connected to the network or not?), And if it is not connected then I reboot ZDO_App use function:

ZDOInitDevice (0);

In ZDO_App.c:

#define DEFAULT_BEACON_ORDER BEACON_ORDER_NO_BEACONS

Maybe this is the reason of refusal search network End-Device after some timeout ?

........................................................ do something ........................................................

After switching on:

#define DEFAULT_BEACON_ORDER        BEACON_ORDER_7_5_SECONDS

I noticed that the connection does not disappear even if stated below, the lines are disabled:

if ( events & GENERICAPP_CONNECTION_EVT )
  {
    static uint8 err_connect = 0;
    // Checking if device is connected
    // Testing is answer ?
    if(!(GenericApp_NwkState == DEV_END_DEVICE) || 
        (status.sended == true && status.answer == false))
    {
      err_connect++;
      status.sended = false;
      //if(err_connect < 5)
      //  ZDO_StartDevice( NODETYPE_DEVICE,MODE_JOIN,BEACON_ORDER_7_5_SECONDS,BEACON_ORDER_7_5_SECONDS );
      //else
      //{
      //  err_connect = 0;
      //  ZDOInitDevice( 0 );
      //}
    }
    else
      err_connect = 0;
    
    // Set timer for message
    osal_start_reload_timer( GenericApp_TaskID,GENERICAPP_CONNECTION_EVT,connectionDelay );
    
    // return unprocessed events
    return (events ^ GENERICAPP_CONNECTION_EVT);
  }

Were disconnected requests to connect to the network?

I want not only to solve the problem, but also to understand its causes, to more like this has happened.