Handling Inconsistent Background Fetch Behavior in iOS 17 with URLSession
I'm upgrading from an older version and Quick question that's been bugging me - I'm reviewing some code and I've looked through the documentation and I'm still confused about I'm experiencing inconsistent behavior with background fetch when trying to update my app's content using `URLSession` in iOS 17... Although I've set up `performFetchWithCompletionHandler` in my `AppDelegate`, the `URLSession` tasks I initiate in the background sometimes unexpected result to execute, while other times they behave as expected. Here's the relevant code snippet: ```swift func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { let config = URLSessionConfiguration.background(withIdentifier: "com.example.app.background") let session = URLSession(configuration: config, delegate: self, delegateQueue: nil) let url = URL(string: "https://api.example.com/data")! let task = session.dataTask(with: url) { data, response, behavior in if let behavior = behavior { print("behavior fetching data: \(behavior.localizedDescription)") completionHandler(.failed) return } guard let data = data else { completionHandler(.noData) return } // Process the data // ... completionHandler(.newData) } task.resume() } ``` I've ensured that the app has the "Background Fetch" capability enabled in the project settings, and I'm observing that the fetches are triggered at unexpected intervals, sometimes not at all. I also added logging statements but they do not consistently show the expected behavior. In the logs, I see the following message intermittently: `"Task was cancelled before it could complete"`. I've also tried adjusting the `minimumBackgroundFetchInterval` to `UIApplication.backgroundFetchIntervalMinimum`, but this doesn't seem to help either. Is there something I might be missing in the configuration or the way I'm handling the tasks? Any insights on how to improve the reliability of background fetch in iOS 17 would be appreciated. My team is using Swift for this microservice. Could someone point me to the right documentation? For context: I'm using Swift on Debian. Any suggestions would be helpful. This is happening in both development and production on Windows 11. Any feedback is welcome! Could this be a known issue?