Incorrect frames in non blocking TWI TX xfer

Question

Hi, 
 I am using the non blocking TWI on the nrf 52840 with the following code: 
 void hal_drv_charger_set_current_768mA(void)
{

uint8_t frame[5] = {0x0F, 0xF0, 0x0F, 0xF0, 0x0F};
 
 // Transfer type
 m_hal_drv_charger.xfer.twi_xfer.type = NRF_DRV_TWI_XFER_TX;

// Length 
 m_hal_drv_charger.xfer.twi_xfer.primary_length = 5;

// Copy the frame pointer
 m_hal_drv_charger.xfer.twi_xfer.p_primary_buf = &frame[0];
 
 //nrf_delay_ms(100);

// Add i2c xfer
 hal_drv_pwr_i2c_add_xfer(&m_hal_drv_charger.xfer);
} 
 The xfer is handled like this: 
 static void launch_xfer_state(void) {
 
 NRF_LOG_INFO("Launch xfer");

//We are not in wait xfer state
 if(m_hal_drv_pwr_i2c.state != WAIT_XFER_PWR_I2C_ST)
 {

// If the XFER queue contains XFERs
 if (!nrf_queue_is_empty(&pwr_i2c_xfer_queue)) 
 {

// Get the XFER from the XFER queue
 if(nrf_queue_pop(&pwr_i2c_xfer_queue, &m_hal_drv_pwr_i2c.xfer) == NRF_SUCCESS)
 {

if (m_hal_drv_pwr_i2c.xfer.twi_xfer.type == NRF_DRV_TWI_XFER_TXRX)
 { 
 //Catch the return data pointer
 preturn = m_hal_drv_pwr_i2c.xfer.twi_xfer.p_secondary_buf;
 }
 
 // Performs the XFER call on the PWR_I2C TWI instance
 memcpy(sent_buff, m_hal_drv_pwr_i2c.xfer.twi_xfer.p_primary_buf, 5);
 xfer_desc = m_hal_drv_pwr_i2c.xfer.twi_xfer;
 primary_length = m_hal_drv_pwr_i2c.xfer.twi_xfer.primary_length;
 //m_hal_drv_pwr_i2c.xfer.twi_xfer.primary_length = 4;

NRF_LOG_INFO("First byte sent is : %d", sent_buff[0]);
 NRF_LOG_INFO("Second byte sent is : %d", sent_buff[1]);
 NRF_LOG_INFO("Third byte sent is : %d", sent_buff[2]);
 NRF_LOG_INFO("4 byte sent is : %d", sent_buff[3]);
 NRF_LOG_INFO("5 byte sent is : %d", sent_buff[4]);
 NRF_LOG_INFO("Frame length is : %d", primary_length);

// Performs the XFER call on the PWR_I2C TWI instance
 result = nrf_drv_twi_xfer(&i2c_twi, &m_hal_drv_pwr_i2c.xfer.twi_xfer, 0);//NRF_DRV_TWI_FLAG_NO_XFER_EVT_HANDLER
 m_hal_drv_pwr_i2c.state = WAIT_XFER_PWR_I2C_ST;
 run_xfer_fsm();
 }

else 
 {
 //error handler if you can't get the XFER from the XFER queue
 }

}

else //If the XFER queue is empty
 {
 // Goes to IDLE state
 m_hal_drv_pwr_i2c.state = IDLE_PWR_I2C_ST;
 run_xfer_fsm();
 }

}
	
 else //We are in wait state
 {
 //Do nothing
 }
} 
 
 TWI config is 
 static void init_state(void) {

// On state transition
 if (m_hal_drv_pwr_i2c.state != m_hal_drv_pwr_i2c.prev_state) {

// Set the entry phase done
 m_hal_drv_pwr_i2c.prev_state = m_hal_drv_pwr_i2c.state;

// Initialize the TWI driver
 ret_code_t err_code = nrf_drv_twi_init(&i2c_twi, &i2c_twi_config, twi_event_handler, NULL);//twi_event_handler
 //herat
 APP_ERROR_CHECK(err_code);
 nrf_drv_twi_enable(&i2c_twi);

// Reset the XFER queue
 nrf_queue_reset(&pwr_i2c_xfer_queue);

// Goes to IDLE state
 m_hal_drv_pwr_i2c.state = IDLE_PWR_I2C_ST;
 }
} 
 and 
 static nrf_drv_twi_config_t i2c_twi_config =
{ 
 .frequency = (nrf_drv_twi_frequency_t)NRF_DRV_TWI_FREQ_100K, 
 .scl = SCL_PWR_PIN, 
 .sda = SDA_PWR_PIN, 
 .interrupt_priority = TWI_DEFAULT_CONFIG_IRQ_PRIORITY, 
 .clear_bus_init = TWI_DEFAULT_CONFIG_CLR_BUS_INIT, 
 .hold_bus_uninit = TWI_DEFAULT_CONFIG_HOLD_BUS_UNINIT, 
}; 
 
 The twi_event_handler is empty. 
 Here is what I see on RTT: 
 
 The result on oscilloscope is good for the first byte, but then its only 0 ..: (slave address is 0x6A):

Thanks