GAP in SPI transfere on STM32WB55RGVx

Iam trying to setup SPI1 on STM32WB nucluo (STM32WB55RGVx), I made a configuration trough the STM cube and do some adjustments, the problem is that in every sequence iam trying to transmit with HAL_SPI_Transmit is a gap for couple of microseconds. Then the sequence follows normally.

Firstly i thought, that the problem is caused by RTOS since i use the mbed, but when the issue was not resolved even if i configured transmit over DMA. Is there any chance that this is the problem of SPI or clock configuration?

SPI Configuration:

static void MX_SPI1_Init(void)
{
 
 /* USER CODE BEGIN SPI1_Init 0 */
 
 /* USER CODE END SPI1_Init 0 */
 
 /* USER CODE BEGIN SPI1_Init 1 */
 
 /* USER CODE END SPI1_Init 1 */
 /* SPI1 parameter configuration*/
 hspi1.Instance = SPI1;
 hspi1.Init.Mode = SPI_MODE_MASTER;
 hspi1.Init.Direction = SPI_DIRECTION_1LINE;
 hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
 hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
 hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
 hspi1.Init.NSS = SPI_NSS_SOFT;
 hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
 hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
 hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
 hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
 hspi1.Init.CRCPolynomial = 7;
 hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
 //hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
 if (HAL_SPI_Init(&hspi1) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN SPI1_Init 2 */
 
 /* USER CODE END SPI1_Init 2 */
 
}

Clock configuration:

void SystemClock_Config(void)
{
 RCC_OscInitTypeDef RCC_OscInitStruct = {0};
 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
 
 /** Configure the main internal regulator output voltage
 */
 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
 /** Initializes the CPU, AHB and APB busses clocks
 */
 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_MSI;
 RCC_OscInitStruct.HSIState = RCC_HSI_ON;
 RCC_OscInitStruct.MSIState = RCC_MSI_ON;
 RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
 RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
 RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_10;
 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 {
 Error_Handler();
 }
 /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
 */
 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK4|RCC_CLOCKTYPE_HCLK2
 |RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 RCC_ClkInitStruct.AHBCLK2Divider = RCC_SYSCLK_DIV1;
 RCC_ClkInitStruct.AHBCLK4Divider = RCC_SYSCLK_DIV1;
 
 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
 {
 Error_Handler();
 }
 /** Initializes the peripherals clocks
 */
 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SMPS;
 PeriphClkInitStruct.SmpsClockSelection = RCC_SMPSCLKSOURCE_HSI;
 PeriphClkInitStruct.SmpsDivSelection = RCC_SMPSCLKDIV_RANGE1;
 
 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN Smps */
 
 /* USER CODE END Smps */
}

Transmit command

int rc;
rc = HAL_SPI_Transmit(&hspi1, _collor_buffer, NUMBER_OF_LEDS*24,10);
printf("Return value %d \n",rc);