Rubys adventure, weird bug

Hello everyone! I posted this in the wrong part of the forum I think so Im reposting here since it seems to be the right place. Im just getting started with unity and C# and I am following the rubys adventure tutorial right now. But I have gotten a weird bug and Im not certain if it is the script(which it shouldnt be since I just wrote what is in the guide) or Unity it self.

I am at the part where you start scripting the first enemy. When I start the game and my main character collides with the enemy character the controls stop working for the character and it sort of floats away to the side when I push any of the arrowkeys. It always floats away from the enemy character.

Is it a bug in the collision detecting system or is it more probable that it is a bug in my scripts?

I am using Unity 2019.1.8f1

Below is the script for the main character

Code (csharp):

1.  
2.  
3. using System.Collections;
4. using System.Collections.Generic;
5. using UnityEngine;
6.  
7. public class RubyController : MonoBehaviour
8. {
9.     public int maxHealth = 5;
10.     public float timeInvincible = 2.0f;
11.  
12.     public int health { get { return currentHealth; } }
13.     int currentHealth;
14.     bool isInvincible;
15.     float invincibleTimer;
16.     public float characterSpeed = 3.0f;
17.  
18.  
19.     Rigidbody2D rigidbody2d;
20.  
21.     // Start is called before the first frame update
22.     void Start()
23.     {
24.         rigidbody2d = GetComponent<Rigidbody2D>();
25.         currentHealth = maxHealth;
26.     }
27.  
28.     // Update is called once per frame
29.     void Update()
30.     {
31.         float horizontal = Input.GetAxis("Horizontal");
32.         float vertical = Input.GetAxis("Vertical");
33.         Vector2 position = rigidbody2d.position;
34.         position.x = position.x + characterSpeed * horizontal * Time.deltaTime;
35.         position.y = position.y + characterSpeed * vertical * Time.deltaTime;
36.         transform.position = position;
37.  
38.         rigidbody2d.MovePosition(position);
39.  
40.         if (isInvincible)
41.         {
42.             invincibleTimer -= Time.deltaTime;
43.             if (invincibleTimer < 0)
44.                 isInvincible = false;
45.         }
46.     }
47.  
48.     public void ChangeHealth(int amount)
49.     {
50.         if (amount < 0)
51.         {
52.             if (isInvincible)
53.                 return;
54.  
55.             isInvincible = true;
56.             invincibleTimer = timeInvincible;
57.         }
58.  
59.         currentHealth = Mathf.Clamp(currentHealth + amount, 0, maxHealth);
60.  
61.         Debug.Log(currentHealth + "/" + maxHealth);
62.     }
63. }
64.  

and below is the script for the enemy

Code (csharp):

1.  
2.  
3. using System.Collections;
4. using System.Collections.Generic;
5. using UnityEngine;
6.  
7. public class EnemyController : MonoBehaviour
8. {
9.     public float enemySpeed = 3.0f;
10.     public bool vertical;
11.     public float changeTime = 3.0f;
12.  
13.     Rigidbody2D rigidbody2D;
14.     float timer;
15.     int direction = 1;
16.  
17.     // Start is called before the first frame update
18.     void Start()
19.     {
20.         rigidbody2D = GetComponent<Rigidbody2D>();
21.         timer = changeTime;
22.     }
23.  
24.     // Update is called once per frame
25.     void Update()
26.     {
27.         timer -= Time.deltaTime;
28.  
29.         if (timer < 0)
30.         {
31.             direction = -direction;
32.             timer = changeTime;
33.         }
34.  
35.         Vector2 position = rigidbody2D.position;
36.        
37.         if (vertical)
38.         {
39.             position.y = position.y + Time.deltaTime * enemySpeed * direction;
40.         }
41.  
42.         else
43.         {
44.             position.x = position.x + Time.deltaTime * enemySpeed * direction;
45.         }
46.  
47.         rigidbody2D.MovePosition(position);
48.     }
49.  
50.     void OnCollisionEnter2D(Collision2D other)
51.     {
52.         RubyController player = other.gameObject.GetComponent<RubyController >();
53.  
54.         if (player != null)
55.         {
56.             player.ChangeHealth(-1);
57.         }
58.     }
59. }
60.  
61.