Balls meant to bounce straight up and down go sideways?

[YodaForce157]

I have a ball that is supposed to bounce on a plane, I generate in a 5x5 grid of balls but every time the row/column is meant to be 6, or the row number is 2 and the column number is 8 (and vice versa) the numbers start to break and aren’t exact ints? They seem to gradually increase, and the row 0 also appears to be moving just very slowly. I have 0 clue why this is.

Script to spawn the balls in:

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

public class CreateBalls : MonoBehaviour
{
    // Start is called before the first frame update
    static int size = 25;
    private GameObject[] Balls = new GameObject[size];

    void Start()
    {
        double l = Math.Sqrt(size);
        int i = 0;
        for (int y = 0; y < l; y++)
        {
            for (int x = 0; x < l; x++)
            {
                Balls[i] = Instantiate(Resources.Load("Objects/MyBouncingBall")) as GameObject;
                Balls[i].transform.position = new Vector3Int(x, 5, y) * 2;
                Balls[i].transform.rotation = Quaternion.identity;
                i++;
            }
        }
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}

Anyone have any ideas?

Here is what happens:

[YodaForce157]

Here are the colliders/physics parts of the balls

[YodaForce157]

Another one as apparently I’m only allowed to post one image at a time

[YodaForce157]

Fixed. Seems to be because I didn’t give the plane a physics material, just set it to the default one rather than None and it worked.