Rigidbody speed in some senes different?!

Questions & Answers
1

Hello out there,
the Controller of a Enemy-bullet is speeding the bullet up:

void Update ()
    {
        rb.velocity = transform.forward * speed;
    }

In some scenes, the bullet travels at the correct speed, in others it is very very slow, but still a bit moving.

here the complete script:

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

public class EnemyBullet : MonoBehaviour {

    [HideInInspector]
    public float speed;
    [HideInInspector]
    public float makePlayerSlower;
    [HideInInspector]
    public float lifeTime;
    [HideInInspector]
    public ParticleSystem explosion;

    float lifeTimer;
    GameObject player;
    Rigidbody rb;
    bool mayDestroy = true;
    bool wasStuck;

	// Use this for initialization
	void Start ()
    {
        rb = GetComponent<Rigidbody>();
    }
	
	// Update is called once per frame
	void Update ()
    {
        rb.velocity = transform.forward * speed;
        wasStuck = false;

        lifeTimer += Time.deltaTime;
        if ((lifeTimer >= lifeTime) && mayDestroy)
            Destroy(gameObject);
    }

    void OnTriggerEnter(Collider other)
    {
        if(other.CompareTag("Player"))
        {
            transform.parent = other.transform;
            rb.isKinematic = true;
            player = other.gameObject;
            player.GetComponent<PlayerControl>().speedReduction = makePlayerSlower;
            player.GetComponent<PlayerControl>().AddStickyBall(gameObject);
            GetComponent<Collider>().enabled = false;
            mayDestroy = false;
            wasStuck = true;
        }
        else if(!other.CompareTag("Enemy"))
        {
            Destroy(gameObject);
        }
    }

    void OnDestroy()
    {
        ParticleSystem explosionClone = Instantiate(explosion, transform.position, transform.rotation);
        Destroy(explosionClone, 1f);
        if(wasStuck)
            player.GetComponent<PlayerControl>().RemoveStickyBall();
    }
}

I am pretty shure, that i don’t change the transform of the bullet in any other scripts!
And i have now Idea…

(btw: if you have any advice for my in my way of scripting, please let me know! :D)

Thanks for reading and trying to help!
WbrJr

2

Try using Time.deltaTime

void Update ()
     {
         rb.velocity = transform.forward * speed*Time.deltaTime;
     }

and try using FixedUpdate() instead of Update() when you are trying to move objects using RigidBody

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