Question 2D Cinemachine Parallax Jitter

I am working on a 2D Train game and for a certain time, I can't get rid of this jitter. The jitter can be most seen in the clouds but sometimes it can be seen on trains too. I have tried Unity PixelPerfectCamera, PixelRounding, changing update methods on Cinemachine Brain, setting Rigidbody2D to interpolate or extrapolate and still can't figure it out.

Video: https://drive.google.com/file/d/1-0eGR6CPGMre1KcsIrjkTU7KaUU2pABP/view

Photos of settings:
Camera:

CM VCAM1:


Player:


Parallax Code:

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class Parallax : MonoBehaviour
7. {
8.     private float length, startpos;
9.     GameObject cam;
10.     public float parallaxEffect;
11.  
12.     Rigidbody2D rb;
13.  
14.     void Start()
15.     {
16.         startpos = transform.position.x;
17.         length = GetComponent<SpriteRenderer>().bounds.size.x;
18.         cam = GameObject.FindGameObjectWithTag("MainCamera");
19.         rb = GetComponent<Rigidbody2D>();
20.     }
21.  
22.     void FixedUpdate()
23.     {
24.        float temp = (cam.transform.position.x * (1-parallaxEffect));
25.        float dist = (cam.transform.position.x * parallaxEffect);
26.  
27.        rb.position = new Vector3(startpos + dist, transform.position.y,transform.position.z);
28.  
29.         if(temp > startpos + length) startpos += length;
30.         else if(temp < startpos - length) startpos -= length;
31.     }
32. }
33.  

 

Gregoryl I love you <3 It works. And thanks also to MelvMay for regarding the Rigidbody2D trash