ARVR RealityView Showing left Camera view Entity near more than the right view

I have this code to make ARVR Stereo View To Be Used in VR Box Or Google Cardboard, it uses iOS 18 New RealityView but for some reason the left side showing the Entity (Box) more near to the camera than the right side which make it not identical, I wonder is this a bug and need to be fixed or what ? thanx Here is the code

import SwiftUI
import RealityKit


struct ContentView : View {
    let anchor1 = AnchorEntity(.camera)
    let anchor2 = AnchorEntity(.camera)
    
    var body: some View {
        HStack (spacing: 0){
            MainView(anchor: anchor1)
            MainView(anchor: anchor2)
        }
        .background(.black)
    }
}

struct MainView : View {
    @State var anchor = AnchorEntity()
    
    var body: some View {
        RealityView { content in
            content.camera = .spatialTracking
            
            let item = ModelEntity(mesh: .generateBox(size: 0.25), materials: [SimpleMaterial()])
            anchor.addChild(item)
            content.add(anchor)

            anchor.position.z = -1.0
            anchor.orientation = .init(angle: .pi/4, axis:[0,1,1])
        } 
    }
}

And Here is the View