iOS 26 MapKit custom Annotation bug

In iOS 26 i have an issue with mapKit. i created a custom annotation using "MKMarkerAnnotationView", it works fine with current stable iOS versions (15 to 18) but with iOS 26 the default annotation is displayed behind my annotation. i checked the Xcode UI inspector and there's a new subview in the "MKMarkerAnnotationView" called "MKMarkerBalloonView" and it's the one displayed.

To be clear, the issue is when running the app on iOS 26, even if i build with iOS 18.x i still have the problem on devices running iOS 26.

i also tried opting out of the liquid Glass by adding UIDesignRequiresCompatibility in the info.plist but it change nothing.

here's the "MKMarkerAnnotationView"

    
    static let reuseId = "AnnotationMarkerView"
    
    private lazy var annotationView: UIView = {
        let hostController = UIHostingController(rootView: AnnotationView())
        let view: UIView = hostController.view
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .clear
        view.accessibilityElementsHidden = true
        return view
    }()
    
    init(annotation: MKAnnotation, reuseIdentifier: String?) {
        super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)
        
        self.setupUI()
        
        self.displayPriority = .required
        self.collisionMode = .circle
        
        self.titleVisibility = .hidden
        self.subtitleVisibility = .hidden
        self.markerTintColor = .clear
        self.glyphTintColor = .clear
        self.glyphImage = nil
        self.selectedGlyphImage = nil
        self.glyphText = nil
    }
    
    required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") }
    
    private func setupUI() {
        self.backgroundColor = .clear
        self.addSubview(self.annotationView)
        self.annotationView.centerXAnchor.constraint(equalTo: self.centerXAnchor, constant: 0).isActive = true
        self.annotationView.centerYAnchor.constraint(equalTo: self.centerYAnchor, constant: -24).isActive = true

        self.bounds = .init(origin: .zero, size: .init(width: 0, height: 0))
    }
}

and the MapViewDelegate:

    
    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        
        guard let annotation = annotation as? Annotation else {
          return nil
        }
        
        let annotatonView = AnnotationMarkerView(annotation: annotation, reuseIdentifier: AnnotationMarkerView.reuseId)
        
        return annotatonView

      }
}

Link to a demo project.

issue on iOS 26:

Subclassing MKAnnotationView (instead of MKMarkerAnnotationView) resolves this issue.

Using MKAnnotationView doesn't support a few MKMarkerAnnotationView specific features, but they aren't used in the snippet anyway (titleVisibility, markerTintColor, etc.)