libuarte init with ANT softdevice ?

Question

Dear Members,

I want to use libuarte with ANT and softdevice,

When I initialize libuarte,

The app keeps restarting by itself.

/**********init from libuarte*****/
			 //err_code=nrf_drv_clock_init();
			 //APP_ERROR_CHECK(err_code);
			// NRF_LOG_INFO("Err_code nrf_drv_clk %u",err_code);
			 
			  //nrf_drv_clock_lfclk_request(NULL);
				
				nrf_libuarte_async_config_t nrf_libuarte_async_config1 = {
            .tx_pin     = SER_APP_TX_PIN,
            .rx_pin     = SER_APP_RX_PIN,
            .baudrate   = NRF_UARTE_BAUDRATE_9600,
            .parity     = NRF_UARTE_PARITY_EXCLUDED,
            .hwfc       = NRF_UARTE_HWFC_DISABLED,
            .timeout_us = 1000,
            .int_prio   = APP_IRQ_PRIORITY_LOW
			      
    };
		err_code=nrf_libuarte_async_init(&libuarte1, &nrf_libuarte_async_config1, uart_event_handler1, (void *)&libuarte1);
			APP_ERROR_CHECK(err_code);
		NRF_LOG_INFO("Err_code libuarte_init libuarte1 %u",err_code);
  	nrf_libuarte_async_enable(&libuarte1);

    GPS_Init();		
		/**********init from libuarte*****/

I commented out

//err_code=nrf_drv_clock_init();

//nrf_drv_clock_lfclk_request(NULL);

//nrf_libuarte_async_enable(&libuarte1);

to stabilize the application,

libuarte setting :

NRF_LIBUARTE_ASYNC_DEFINE(libuarte1, 1, 2, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3); //timer0 id =2, rtc1 id =2

what do I miss here ? is it related with my app timer conflicting with libuarte timer ?

I get this in my log :

<error> hardfault: HARD FAULT at 0x00017FB8

<error> hardfault:   R0:  0x20001064  R1:  0x39000000  R2:  0x00000010  R3:  0x0000000F

<error> hardfault:   R12: 0x20000E08  LR:  0x0001E39F  PSR: 0x21000029

<error> hardfault: Cause: Data bus error (PC value stacked for the exception return points to the instruction that caused the fault).

<error> hardfault: Bus Fault Address: 0x39000000

Is
NRF_LIBUARTE_ASYNC_DEFINE(libuarte, 0, 0, 0, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);

conflicting with my current UART setting for NRF_LOG in softdevice ? it's using the same port UART0

Thanks