How to correctly enable/disable the Bluetooth radio on the nRF Distance Measurement with BLE Discovery?"

Question

Hey, 
 
 I took the code example for nRF Distance Measurement with Bluetooth LE discovery , and updated the application to start or stop the radio based on a specific condition. I have a button for this and I am using callback. I found that disabling the BLE radio is not supported ( link ). I am attempting to halt the scanning and advertising processes. However, this is not working as expected. 
 I invoke this function to deactivate both advertising and scanning. 
 void stop_ble_system(void){

	int err;
	ble_working = 0;
	LOG_INF("BLE Stopping
");
	k_sleep(K_USEC(50));
	
	err = bt_scan_stop();
	if (err) {
 LOG_INF("bt_scan_stop failed (err %d)
", err);
 return;
	}
	err = bt_le_ext_adv_stop(adv);
	if (err) {
 printk("Failed to stop extended advertising (err %d)
", err);
 return;
	}
	dk_set_led(DK_LED1, (ble_working));

} 
 And turn it on with this function: 
 void start_ble_system(void){

int err;
	ble_working = 1;
	dk_set_led(DK_LED1, (ble_working));
	err = bt_enable(NULL);
	struct bt_le_ext_adv_start_param ext_adv_start_param = {0};
	if (err) {
 LOG_INF("Bluetooth init failed (err %d)
", err);
 return ;
	}

err = bt_le_ext_adv_create(adv_param, &adv_cb, &adv);
	if (err) {
 printk("Failed to create advertising set (err %d)
", err);
 return;
	}

err = bt_le_ext_adv_set_data(adv, ad, ARRAY_SIZE(ad), sd, ARRAY_SIZE(sd));
	if (err) {
 printk("Failed setting adv data (err %d)
", err);
 return;
	}

err = bt_le_ext_adv_start(adv, &ext_adv_start_param);
	if (err) {
 printk("Failed to start extended advertising (err %d)
", err);
 return;
	}

err = scan_start();
	if (err) {
 printk("Failed to start scanning (err %d)
", err);
	}
} 
 So, essentially, ranging runs alongside the scanner and advertising processes. During this procedure, I am attempting to deactivate both. I'm uncertain if this is the correct approach. 
 While ranging, when I disable advertising and scanning, the application doesn't crash. However, the application crashes when I attempt to restart it. I noticed this because the LED is not blinking (I have set it to blink at 1 Hz). Do I need to deactivate scanning and advertising in a different order or do I need to call an additional function? 
 Here is the console output: 
 
 I have searched the forum but no Q&A topic to help me. 
 Thanks for the help!!!