In my iOS application I have problem in using URLSession with URLSessionConfiguration.background(withIdentifier:_). In my project i need to use background mode because my application must be able to fetch large files from server. For this case i had enabled "Background modes" - fetch and processing. Here is example of code which I use in my application (as on Your example in documentation https://developer.apple.com/documentation/foundation/url_loading_system/downloading_files_in_the_background):import UIKit class ViewController: UIViewController { @IBOutlet weak var textView: UITextView! private var downloadRequest: URLSessionDownloadTask? private lazy var urlSession: URLSession = { let config = URLSessionConfiguration.background(withIdentifier: "backgroundLoadingSession") config.isDiscretionary = true config.sessionSendsLaunchEvents = true return URLSession(configuration: config, delegate: self, delegateQueue: nil) }() override func viewDidLoad() { super.viewDidLoad() DispatchQueue.main.asyncAfter(deadline: .now() + 1) { [weak self] in self?.fetch() } } func fetch() { guard let url = URL(string: "https://images.idgesg.net/images/idge/imported/imageapi/2019/07/26/15/cloud_istock_harnnarong-100803439-large.jpg") else { return } downloadRequest = urlSession.downloadTask(with: url) downloadRequest?.resume() } } extension ViewController: URLSessionDownloadDelegate, URLSessionDelegate { func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) { DispatchQueue.main.async { [weak self] in self?.textView.text = downloadTask.response.debugDescription } } }When I'm running this code from Xcode on iPhone everything works fine - request sent, response received. But after application was terminated (or device was restarted) on next application launch (not by Xcode) anything doesn't happen - request not sent and as result response not received. I have no idea why it doesn't works and hope for Your help. I test this code on:iPhone 6 (iOS 12.4.2), iPhone XsMax (iOS 13.3)Xcode 11.2.1 (MacOS Catalina 10.15.1)Xcode 10.3 (MacOS Mojave 10.14.6)Also, here is my Info.plist file code:<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleDevelopmentRegion</key> <string>$(DEVELOPMENT_LANGUAGE)</string> <key>CFBundleExecutable</key> <string>$(EXECUTABLE_NAME)</string> <key>CFBundleIdentifier</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundleName</key> <string>$(PRODUCT_NAME)</string> <key>CFBundlePackageType</key> <string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string> <key>CFBundleShortVersionString</key> <string>1.0</string> <key>CFBundleVersion</key> <string>1</string> <key>LSRequiresIPhoneOS</key> <true/> <key>UIApplicationSceneManifest</key> <dict> <key>UIApplicationSupportsMultipleScenes</key> <false/> <key>UISceneConfigurations</key> <dict> <key>UIWindowSceneSessionRoleApplication</key> <array> <dict> <key>UISceneConfigurationName</key> <string>Default Configuration</string> <key>UISceneDelegateClassName</key> <string>$(PRODUCT_MODULE_NAME).SceneDelegate</string> <key>UISceneStoryboardFile</key> <string>Main</string> </dict> </array> </dict> </dict> <key>UIBackgroundModes</key> <array> <string>fetch</string> <string>processing</string> </array> <key>UILaunchStoryboardName</key> <string>LaunchScreen</string> <key>UIMainStoryboardFile</key> <string>Main</string> <key>UIRequiredDeviceCapabilities</key> <array> <string>armv7</string> </array> <key>UISupportedInterfaceOrientations</key> <array> <string>UIInterfaceOrientationPortrait</string> <string>UIInterfaceOrientationLandscapeLeft</string> <string>UIInterfaceOrientationLandscapeRight</string> </array> <key>UISupportedInterfaceOrientations~ipad</key> <array> <string>UIInterfaceOrientationPortrait</string> <string>UIInterfaceOrientationPortraitUpsideDown</string> <string>UIInterfaceOrientationLandscapeLeft</string> <string>UIInterfaceOrientationLandscapeRight</string> </array> </dict> </plist>