My magnetic effect breaks if I add an Impulse force in Start

So I create a magnetic effect, where objects are sucked to my player.
It works great.

Now I want those same objects to get a little Impulse force when they spawn. This has somehow reversed my magnetic effect? The objects are now pushed away from the player...

All I did was add this Line in Start():

_rb.AddForce(_forwardThrust, _upThrust, _forwardThrust, ForceMode.Impulse);

Full Script here:

Code (CSharp):

1. public class RandomMagneticForce : MonoBehaviour
2. {
3.     private bool _inside;
4.     private Transform _magnet;
5.     private Rigidbody _rb;
6.     private SphereCollider _sphere;
7.     float radius = 5f;
8.     [SerializeField]
9.     private float _delay;
10.     [SerializeField]
11.     private float _force = 70;
12.     [SerializeField]
13.     private float _upThrust, _forwardThrust;
14.  
15.     void Start()
16.     {
17.         _magnet = GameManager.instance.ActivePlayer.gameObject.transform;
18.         _rb = GetComponent<Rigidbody>();
19.         _sphere = GetComponent<SphereCollider>();
20.         _inside = false;
21.         _rb.AddForce(Random.Range(-_forwardThrust, _forwardThrust), _upThrust, Random.Range(-_forwardThrust, _forwardThrust), ForceMode.Impulse);
22.     }
23.  
24.     void OnTriggerEnter(Collider other)
25.     {
26.         if (other.gameObject.CompareTag(Constants.TAG_PLAYER))
27.         {
28.             _inside = true;
29.         }
30.     }
31.     void OnTriggerExit(Collider other)
32.     {
33.         if (other.gameObject.CompareTag(Constants.TAG_PLAYER))
34.         {
35.             _inside = false;
36.         }
37.     }
38.  
39.     private void Update()
40.     {
41.         if (_delay > 0)
42.             _delay -= Time.deltaTime;
43.  
44.         if (_inside)
45.         {
46.             if (_delay <= 0)
47.             {
48.                 Vector3 magnetField = _magnet.position - transform.position;
49.                 float index = (radius - magnetField.magnitude) / radius;
50.                 _rb.AddForce(_force * magnetField * index);
51.             }
52.         }
53.     }
54. }