HAL_UART_Receive_IT( &huart2, (uint8_t * )aRXBufferUser, RX_BUFFER_SIZE);
...

void HAL_UART_RxCpltCallback(UART_HandleTypeDef * huart) {
    /* USER CODE BEGIN HAL_UART_RxCpltCallback_1 */
    /* USER CODE END HAL_UART_RxCpltCallback_1 */
    if (huart->Instance == USART1) {
        if ((NULL != RxCpltCallback)
             && (HAL_UART_ERROR_NONE == huart->ErrorCode)) {
            RxCpltCallback( &charRx, 1, 0);
        }

        HAL_UART_Receive_IT(huart,  &charRx, 1);
    }

    /* USER CODE BEGIN HAL_UART_RxCpltCallback_2 */
    if (huart->Instance == USART2) {
        UART2_SET = 1;
    }
    /* USER CODE END HAL_UART_RxCpltCallback_2 */
}
void MeasurePM_sens(void) {
    uint16_t RxLen;
    if (aRXBufferUser[0] == 0x02 && aRXBufferUser[31] == 0x03) {
        PM2_5 = aRXBufferUser[5] + aRXBufferUser[6] * 256
             + aRXBufferUser[7] * 65536;
        UART2_SET = 0;
        HAL_UART_Receive_IT( &huart2, (uint8_t * )aRXBufferUser, RX_BUFFER_SIZE);
    } else
        HAL_UARTEx_ReceiveToIdle( &huart2, (uint8_t * )aRXBufferUser,
            RX_BUFFER_SIZE,  &RxLen, 1000);
}

//or:

HAL_UARTEx_ReceiveToIdle_IT(&huart2, (uint8_t*) aRXBufferUser, RX_BUFFER_SIZE);

Ok it not fixed fully will add some timer... probably..
upd: interesting but works - two calls together:

HAL_UART_Receive_IT(&huart2, (uint8_t *) aRXBufferUser, RX_BUFFER_SIZE);
HAL_UARTEx_ReceiveToIdle(&huart2, (uint8_t *) aRXBufferUser, RX_BUFFER_SIZE, &RxLen, 1000);