CC2640R2F: UART processes only 32 bytes when copying and pasting to Tera Term

Part Number:CC2640R2F

Hi,

    I have implemented UART to process per byte. Here is my code below. There is no problem with this code when I enter manually through Tera Term by typing at keyboard. However, when I copy and paste to Tera Term more than 37 bytes or characters only the 32 bytes is stored at CmdRxBuf. We have a Labview program that sends the same 37 characters and I get same results. The copying and pasting at Tera Term problem was solved when I set a 1 msec/char transmit delay. What could be causing this UART problem? 

void UartApp__UartRxCB(UART_Handle handle, void *buf, size_t count)
{
    TxBuf = ((uint8_t*)buf)[0]; 

    if(TxBuf == '\r')
    {
        CmdRxBuf[charcount] = TxBuf;
        UartApp__WriteString("\r\n");        

        for (i = 0; i < charcount; i++)
        {
            TestApp__DecodeData(CmdRxBuf[i]);
        }
        
        CmdRxBuf[i] = '\0';
        TestApp__DecodeData(CmdRxBuf[i]);
        
        /* Clear CmdRxBuf */
        for (i = 0; i < UART_RX_DATA_LENGTH; i++)
        {
            CmdRxBuf[i] = '\0';
        }
        charcount = 0;  
    }
    else
    {
        CmdRxBuf[charcount] = TxBuf; 
        charcount++;     
    }  

    UART_write(hUART, &TxBuf, sizeof(TxBuf));
    UART_read(hUART, &RxBuf, sizeof(RxBuf)/sizeof(BUFTYPE)); 
   
}

void UartApp__Init(void)
{
    const char  echoPrompt[] = "UART Initialized ! ! !\r\n";
    UART_Params uartParams;

    /* Call driver init functions */
    UART_init();

    /* Create a UART with data processing off. */
    UART_Params_init(&uartParams);

    uartParams.readMode = UART_MODE_CALLBACK;
    uartParams.writeMode = UART_MODE_CALLBACK;
    uartParams.readCallback = UartApp__UartRxCB;
    uartParams.writeCallback = UartApp__UartTxCB;
    uartParams.readEcho = UART_ECHO_OFF;
    uartParams.baudRate = 115200;

    uartParams.readDataMode = UART_DATA_BINARY;
    uartParams.writeDataMode = UART_DATA_BINARY;
    uartParams.dataLength = UART_LEN_8;
    uartParams.readReturnMode = UART_RETURN_FULL;

    hUART = UART_open(Board_UART0, &uartParams);

    if (hUART == NULL)
    {
      /* UART_open() failed */
      while (1);
    }

    UART_write(hUART, echoPrompt, sizeof(echoPrompt)); 
    UART_read(hUART, &RxBuf, sizeof(RxBuf)/sizeof(BUFTYPE));

    charcount = 0;
}

- kel