hi,
I discovered a bug in my game. This minimal jsfiddle reproduces my bug : when i restart my scene around 6X times my ball in my scene go out of my world. What i’m doing wrong ?
Could you help me please, because it’ the last bug and i could publish my game 
https://jsfiddle.net/espace3d/e7xdtv4m/74/
var f = {}
var o = {}
f.init_test = (g) => {
cat0 = g.matter.world.nextCategory();
f.create_terrain = (g) => {
o.limit_ball_left = g.matter.add.image(0, 320, "limit_v", null, {
restitution: 0,
isStatic: true
}).setVisible(true).setCollisionCategory(cat0)
o.limit_ball_left.name = 'left'
o.limit_ball_right = g.matter.add.image(300, 320, "limit_v", null, {
restitution: 0,
isStatic: true
}).setVisible(true).setCollisionCategory(cat0)
o.limit_ball_right.name = 'right'
}
f.create_terrain(g)
o.ball = g.matter.add.image(160, 50, 'ball').setVelocity(10).setBounce(1)
window.setInterval(function () {
g.scene.stop('test')
g.scene.start('test')
}, 2000);
}
//init_main = () => {
const my_game = {
init: () => {
var boot = new Phaser.Class({
Extends: Phaser.Scene,
initialize: function boot() {
Phaser.Scene.call(this, {
key: 'boot'
});
},
preload: function () {
this.load.image("ball", "https://i.postimg.cc/rFFByHRS/ball.png");
this.load.image("limit_v", "https://i.postimg.cc/JnFkyv4G/limit-v.png");
},
create: function () {
this.scene.launch('test')
},
});
var test = new Phaser.Class({
Extends: Phaser.Scene,
initialize: function main() {
Phaser.Scene.call(this, {
key: 'test'
});
},
create: function () {
f.init_test(this)
},
update: function () {},
});
var config = {
type: Phaser.WEBGL,
width: 320,
height: 640,
backgroundColor: '#000000',
parent: 'phaser-game',
physics: {
default: 'matter',
matter: {
debug: false,
gravity: {
y: 0,
x: 0,
}
},
},
callbacks: {
postBoot: function (game) {
game.canvas.style.width = '100%';
game.canvas.style.height = '100%';
}
},
scene: [boot, test]
}
var game = new Phaser.Game(config);
},
}
my_game.init()