BluetoothGatt api is not pairing with ibeacon in Marshmallow

Question

I'm trying to programmatically pair with Ble iBeacon using BluetoothGatt API in android.I can able to pair with Ble iBeacon up to lollipop.But i cannot pair in Marshmallow(My testing device is oneplus 3).I'm using altbeacon library for beacon scanning.

Also, i gave ACCESS_COARSE_LOCATION,ACCESS_FINE_LOCATION permission in the manifest file and turned on GPS location.

private BluetoothGatt mGatt;
BluetoothAdapter baBluetoothAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    baBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    intentFilter = new IntentFilter();
    intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);       
    registerReceiver(myReceiver, intentFilter);
}

Here i'm sending beacon mac id

public void PairToDevice(String sMacId) {

   BluetoothDevice device = baBluetoothAdapter.getRemoteDevice(sMacId);      

    if (mGatt == null) {
        mGatt = device.connectGatt(this, false, gattCallback);
    }
}
private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        Log.i("onConnectionStateChange", "Status: " + status);
        switch (newState) {
            case BluetoothProfile.STATE_CONNECTED:
                Log.e("gattCallback", "STATE_CONNECTED");
                gatt.discoverServices();
                break;
            case BluetoothProfile.STATE_DISCONNECTED:
                Log.e("gattCallback", "STATE_DISCONNECTED");
                break;
            default:
                Log.e("gattCallback", "STATE_OTHER");
        }
    }

    @Override
    public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
        super.onCharacteristicChanged(gatt, characteristic);
    }

    @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) {

    }
}

Here i'm checking bonding state.Bonding state is always none in Marshmallow.But lessthan marshmallow it is working fine.

private BroadcastReceiver myReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            int nState = device.getBondState();

            if (nState == BluetoothDevice.BOND_BONDED) {
                Log.e("Bond Information", "device bonded");

            } else if (nState == BluetoothDevice.BOND_BONDING) {
                 Log.e("Bond Information", "device bonding");
            } else if (nState == BluetoothDevice.BOND_NONE) {
                 Log.e("Bond Information", "bond none");
            }
        }
    }
};