XCode 13 SKScene issue on simulator

I've just updated to XCode 13.0 (13A233), and I noticed that my project behaves differently (on the simulator). Here is a snippet of the code:

class GameScene: SKScene {

    override func didMove(to view: SKView) {
        let backgroundSprite = SKSpriteNode(imageNamed: "background")
        backgroundSprite.position = CGPoint(x: 512, y: 384)
        backgroundSprite.blendMode = .replace
        backgroundSprite.zPosition = -1
        addChild(backgroundSprite)
        
        physicsBody = SKPhysicsBody(edgeLoopFrom: frame)
        
        makeSlot(at: CGPoint(x:128, y:0), isGood: true)
        makeSlot(at: CGPoint(x:384, y:0), isGood: false)
        makeSlot(at: CGPoint(x:640, y:0), isGood: true)
        makeSlot(at: CGPoint(x:896, y:0), isGood: false)        
    }

    func makeSlot(at position: CGPoint, isGood: Bool){
        let slotSprite: SKSpriteNode
        if isGood {
            slotSprite = SKSpriteNode(imageNamed: "slotBaseGood")         
        } else {
            slotSprite = SKSpriteNode(imageNamed: "slotBaseBad")
        }
        slotSprite.position = position
        slotSprite.physicsBody = SKPhysicsBody(rectangleOf: slotSprite.size)
        slotSprite.physicsBody?.isDynamic = false
        addChild(slotSprite)
    }
    
}

The output is: https://i.stack.imgur.com/QkUhU.png

But, if I change the y coordinate of the CGPoints to be non zero. i.e.:

override func didMove(to view: SKView) {
    let backgroundSprite = SKSpriteNode(imageNamed: "background")
    backgroundSprite.position = CGPoint(x: 512, y: 384)
    backgroundSprite.blendMode = .replace
    backgroundSprite.zPosition = -1
    addChild(backgroundSprite)
    
    physicsBody = SKPhysicsBody(edgeLoopFrom: frame)
    
    makeSlot(at: CGPoint(x:128, y:30), isGood: true)
    makeSlot(at: CGPoint(x:384, y:30), isGood: false)
    makeSlot(at: CGPoint(x:640, y:30), isGood: true)
    makeSlot(at: CGPoint(x:896, y:30), isGood: false)
    
}

Then I can see the the expected result (well.. not really). Output: https://i.stack.imgur.com/DdMX1.png

It is as if there is a bug that cause an extra margin at the bottom of the screen. Note:

1. The same code works previously in XCode 12 (I didnt have to add extra 30 points to y coordinate)
2. If I open the same code that was written in XCode 12 before, then it works ok (i.e. i didnt have to add that extra 30 points). I should also mention that I noticed this behaviour when I tried to redo the project in XCode 13.
3. Code works OK on actual device (I didnt have to add extra 30 points to y coordinate).

So... based on point 3.. I guess this is an XCode bug? Or have I missed something in the XCode 13 release notes?