[Partially solved] ISR from SoftwareSerial port

Robin2:
Please make your Posts less ambiguous.

Initially, I was sure that the problem is delayed. But yesterday empirically found that the problem is continuous sending packets to the display. Accordingly, I need a full-duplex.

void loop(void)
{   
    /*
     * When a pop or push event occured every time,
     * the corresponding component[right page id and component id] in touch event list will be asked.
     */
    nexLoop(nex_listen_list);

    weight = Get_Weight(); //get weight
    memset(buffer, 0, sizeof(buffer));
    itoa(weight, buffer, 10);
    t0.setText(buffer); //Sending data to the display. Everything works fine without this line
}

I tried to do on the advice of @/dev, but nothing came of it. Apparently, it is necessary to understand how to work with NeoSWSerial