Background networking in didUpdateLocations

I would like to clarify one thing about didUpdateLocations in background.

In our app we use GPS tracking in the background. We use CLLocationManagerDelegate's didUpdateLocations method which contains a network call. We want to make sure that network call works in the background too.

For example in this sample code we call ping() when didUpdateLocations triggers. During our tests it worked all the time even in background mode.

import UIKit
import CoreLocation

class ViewController: UIViewController {

    let locationManager = CLLocationManager()
    override func viewDidLoad() {
        super.viewDidLoad()
        if CLLocationManager.locationServicesEnabled() {
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyBest
            locationManager.activityType = .automotiveNavigation
            locationManager.allowsBackgroundLocationUpdates = true
            locationManager.pausesLocationUpdatesAutomatically = false
            checkLocationAuthorization()
            locationManager.requestAlwaysAuthorization()
        }
    }

    func ping(url: String = "https://www.google.com") {
        URLSession.shared.dataTask(with: URL(string: url)!) { (_, response, _) in
            if let response = response as? HTTPURLResponse {
                print(response.statusCode)
            }
            }.resume()
    }

    func checkLocationAuthorization() {
        switch CLLocationManager.authorizationStatus() {
        case .authorizedAlways:
            locationManager.startUpdatingLocation()
        default:
            break
        }
    }

}

extension ViewController: CLLocationManagerDelegate {
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let location = locations.last else { return }
        print(location.timestamp)
        ping()
    }

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        checkLocationAuthorization()
    }

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print(error.localizedDescription)
    }
}

So our question is the following: are network calls (even in background mode) supported in didUpdateLocations or there are some cases when it will not work? We want to make sure that's work every time.