Why SCNLight created automatically in SCNScene? (SceneKit)

It is a kind of weird phenomenon that I found out. There is a very simple example, I have an ARSCNView which is empty, just rootnode and camera, so it means that the camera is open, but there is nothing on the screen (just camera).

There is a method that I call from the viewDidLoad() { printAllScene(node: scnView.scene.rootNode) } in order to print all the nodes on the scene

    private func printAllScene(node: SCNNode) {
        print("node: \(node), parent is: \(String(describing: node.parent))")
        
        for curNode in node.childNodes {
            printAllScene(node: curNode)
        }
    }

This recursive method prints all the nodes on the scene, so after I call it in the viewDidLoad() I get such an output

>>> 1
node: <SCNNode: 0x283313300 | 1 child>, parent is: nil
node: <SCNNode: 0x283318500 | camera=<SCNCamera: 0x1065261c0> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 1 child>)
<<<

everything is ok here, but then after I call the same print method from the button click in a few seconds I get another output

>>> 3
node: <SCNNode: 0x283313300 | 3 children>, parent is: nil
node: <SCNNode: 0x283318500 pos(-0.002828 0.016848 0.034329) rot(0.229921 0.895326 -0.381477 0.336716) scale(1.000000 1.000000 1.000000) | camera=<SCNCamera: 0x1065261c0> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 3 children>)
node: <SCNNode: 0x283336d00 | light=<SCNLight: 0x103973dd0 | type=probe> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 3 children>)
node: <SCNNode: 0x283324800 pos(-0.007079 -0.074922 0.031407) rot(0.000000 -1.000000 0.000000 1.474911) | light=<SCNLight: 0x103985120 | type=probe> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 3 children>)
<<<

It has already had 3 children instead of one, how?? and then after a few seconds more I try to click again and get another output

>>> 3
node: <SCNNode: 0x283313300 | 4 children>, parent is: nil
node: <SCNNode: 0x283318500 pos(0.000974 0.011970 0.039510) rot(0.231398 0.878019 -0.418974 0.304382) scale(1.000000 1.000000 1.000000) | camera=<SCNCamera: 0x1065261c0> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 4 children>)
node: <SCNNode: 0x283336d00 | light=<SCNLight: 0x103973dd0 | type=probe> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 4 children>)
node: <SCNNode: 0x283324800 pos(-0.007079 -0.074922 0.031407) rot(0.000000 -1.000000 0.000000 1.474911) | light=<SCNLight: 0x11aceec70 | type=probe> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 4 children>)
node: <SCNNode: 0x28332ac00 pos(-0.007079 -0.074922 0.031407) rot(0.000000 -1.000000 0.000000 1.474911) | light=<SCNLight: 0x11b908130 | type=probe> | no child>, parent is: Optional(<SCNNode: 0x283313300 | 4 children>)
<<<

It has 4 children, interesting huh?

Also should be mentioned that I see according to the documentation there is such a property automaticallyUpdatesLighting that seems very close to being the right solution, I set it in viewDidLoad like this scnView.automaticallyUpdatesLighting = false, but it doesn't make difference in my case, I still see that light nodes are adding.

Could it be related to the configuration? Like the ARKit tried to create the light nodes related to the real light ambiance in order to simulate it on the scene or something like this?