Unable to Change Map Language: localizeLabels(into:forLayerIds:) Method Not Working

Environment

• Xcode version: Version 16.2 (16C5032a)
• iOS version: 18+
• Devices affected: All
• Maps SDK Version: 11.9.0

Observed behavior and steps to reproduce

localizeLabels(into:forLayerIds:) Method Not Working

Simplest example:

import UIKit
import Combine
import MapboxMaps

class ViewController: UIViewController {

  private lazy var mapView = MapView(frame: .zero)

  private var cancellables: Set<AnyCancellable> = []

  override func viewDidLoad() {
    super.viewDidLoad()
    view.addSubview(mapView)
    mapView.frame = view.bounds

    preconditionFailure("Set your accessToken!")
    MapboxOptions.accessToken = ""

    mapView.mapboxMap.onMapLoaded.observe { [weak self] _ in
      /// https://docs.mapbox.com/help/troubleshooting/change-language/#mapbox-maps-sdk-for-ios
      try! self!.mapView.mapboxMap.localizeLabels(into: Locale(identifier: "ar"))
      /// No effect
    }
    .store(in: &cancellables)
  }

}

Expected behavior

Based on the documentation, I expect a change in language.
https://docs.mapbox.com/help/troubleshooting/change-language/#mapbox-maps-sdk-for-ios

Additional links and references

Demo project with bug https://github.com/Savva-Shuliatev/Mapbox-localization-bug

Start by reproducing the reported behavior from the ViewController example, using MapView and mapboxMap.localizeLabels(into:forLayerIds:) after onMapLoaded. Compare the result with the linked change-language documentation and demo project; done means map labels visibly change to the requested Arabic locale.