Question Attraction of objects

Hello everyone! There is a script for the attraction of two objects - spheres.
Faced several problems in it at once

Code (CSharp):

1. private HashSet<Rigidbody> affectedBodies = new HashSet<Rigidbody>();
2.     private Rigidbody componentRigidbody;
3.     // Start is called before the first frame update
4.     void Start()
5.     {
6.         componentRigidbody = GetComponent<Rigidbody>();
7.     }
8.     private void OnTriggerEnter(Collider other)
9.     {
10.         if ((other.attachedRigidbody != null))
11.             {
12.                 affectedBodies.Add(other.attachedRigidbody);
13.             }
14.     }
15.     private void OnTriggerExit(Collider other)
16.     {
17.         if (other.attachedRigidbody != null)
18.         {
19.             affectedBodies.Remove(other.attachedRigidbody);
20.         }
21.     }
22.     // Update is called once per frame
23.     void Update()
24.     {
25.         foreach (Rigidbody body in affectedBodies)
26.         {
27.             Vector3 directionToSphere = (transform.position - body.position).normalized;
28.             float distance = (transform.position - body.position).magnitude;
29.             float strength = body.mass * componentRigidbody.mass / distance;
30.             body.AddForce(directionToSphere * strength);
31.         }
32.     }

Because of this part of the script, the balls behave inadequately: when launched, instead of being attracted to each other, they jump up, and then they start to wind in different directions

Code (CSharp):

1. Vector3 directionToSphere = (transform.position - body.position).normalized;
2.             float distance = (transform.position - body.position).magnitude;
3.             float strength = body.mass * componentRigidbody.mass / distance;
4.             body.AddForce(directionToSphere * strength);

But, if you replace "strength" with a constant, then this will not happen.

And still it is not possible to refer to the object by the tag - objects with tag "11" don't react

Code (CSharp):

1. private void OnTriggerEnter(Collider other)
2.     {
3.        if (other.gameObject.CompareTag("11"))
4.        {
5.             if ((other.attachedRigidbody != null))
6.             {
7.                 affectedBodies.Add(other.attachedRigidbody);
8.             }
9.        }
10.     }

 

"distance" gives strange values