bounce problem! The ball sometimes stuck to wall.

Questions & Answers
1

the infinite moving ball(player) goes up by hitting walls and reflects at 45 degrees. but mostly the ball goes along to the wall and thus the velocity changes. i dont want to change velocity and dont want to stuck to wall.

to prevent this issue:
I have attached to physic material to ball with 0 friction and 1 bounciness.
i have also attached the wall 0 friction and 0 bounciness.

but it s not the solution. can anybody help me?

2

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class PlayerMovement : MonoBehaviour
{
    public GameObject gameOverPage;

    private Rigidbody rb;
    Vector3 lastVelocity;
    public Vector3 initialVelocity;
    public float minVelocity=1f;
    
    void Awake()
    {
        rb = GetComponent<Rigidbody>();
    }

    void Start()
    {
        rb.velocity = initialVelocity;
        rb.AddForce(initialVelocity);
        
    }

    void Update()
    {
       
        lastVelocity = rb.velocity;
        

        if (Input.GetMouseButtonDown(0))
        {
            Bounce(Vector3.right);
        }

       

        Debug.Log(rb.velocity);
    }

    void OnCollisionEnter(Collision coll)
    {
        
        if (coll.gameObject.tag == "Wall")
        {
           
            Bounce(coll.contacts[0].normal);

           
        }

        if (coll.gameObject.tag == "Obstacle")
        {
            
            rb.velocity = Vector3.zero;
            gameOverPage.SetActive(true);
        }

        
    }

    void Bounce(Vector3 CollNormal)
    {
       var speed = lastVelocity.magnitude;
       var direction = Vector3.Reflect(lastVelocity.normalized, CollNormal);
       rb.velocity = direction * Mathf.Max(speed, minVelocity);
       getNormal = new Vector3(-rb.velocity.x, 0, 0);
    }
       
    public void Replay()
    {
        SceneManager.LoadScene("SampleScene");
    }

}