Visa error only on laptop

Hi, i make VISA labview program to send data MCU to PC.

The MCU serial send code is below.

baud rate = 115200.

{

uint8_t upper= 0xBE;
uint8_t lower= 0xD7;
uint8_t buff=0;
uint32_t val[4];
val[0]=value_adc[0];
val[1]=value_adc[1];
val[2]=value_adc[2];
val[3]=value_adc[3];



HAL_UART_Transmit(&huart1, &upper, 1, HAL_MAX_DELAY);
HAL_UART_Transmit(&huart1, &lower, 1, HAL_MAX_DELAY);
buff=val[0]>>8;
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);
buff=val[0];
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);

buff=val[1]>>8;
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);
buff=val[1];
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);

buff=val[2]>>8;
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);
buff=val[2];
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);

buff=val[3]>>8;
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);
buff=val[3];
HAL_UART_Transmit(&huart1, &buff, 1, HAL_MAX_DELAY);

}

This routine is send every 1ms.

My Labview program is attached.

I running the program on my desktop PC, there is no problem.

But running on laptop PC, the data is delayed.

Data is accumulated somewhere continuously.

When i stop send data at MCU, the labview output continuously.( I thinks it is accumulated Data)

The Labview program is same version.

Why this error is occur?

I check com port, but it is not problem. And another serial com program is well operation. ex) arduino serial monitor.