We are experiencing an issue where UIDocumentPickerViewController causes an uncaught exception when it is dismissed under certain conditions. The error appears as: <NSXPCConnection: 0x301ac7660> connection from pid 2075 on anonymousListener or serviceListener: Warning: Exception caught during invocation of selector _updateRemoteBarButtonFrames:forUUID:, dropping incoming message and invalidating the connection. Exception: DocumentManager service tried to send a message to a deallocated host proxy DocumentManager service tried to send a message to a deallocated host proxy ( 0 CoreFoundation 0x0000000186c2a608 0013A8B1-2524-3534-B5BA-681AAF18C798 + 185864 1 libobjc.A.dylib 0x00000001841a5244 objc_exception_throw + 88 2 Foundation 0x000000018602eec0 E2F95328-659E-3C01-97F7-52B5B3BB7AA5 + 8576704 3 DocumentManager 0x00000002177cf7b8 0BAEFA1B-BD6D-3472-A1B3-6E09F5DE54F2 + 96184 4 CoreFoundation 0x0000000186c2d078 0013A8B1-2524-3534-B5BA-681AAF18C798 + 196728 5 CoreFoundation 0x0000000186c2cef0 _CF_forwarding_prep_0 + 96 6 Foundation 0x00000001858b8d8c E2F95328-659E-3C01-97F7-52B5B3BB7AA5 + 753036 7 Foundation 0x00000001858b7fc8 E2F95328-659E-3C01-97F7-52B5B3BB7AA5 + 749512 8 Foundation 0x00000001858b7220 E2F95328-659E-3C01-97F7-52B5B3BB7AA5 + 746016 9 Foundation 0x00000001858b70d8 E2F95328-659E-3C01-97F7-52B5B3BB7AA5 + 745688 10 libxpc.dylib 0x00000002119f1a50 527F7127-9586-32C8-9D8B-2972D39EAD7A + 72272 11 libxpc.dylib 0x00000002119f35cc 527F7127-9586-32C8-9D8B-2972D39EAD7A + 79308 12 libdispatch.dylib 0x000000010160a638 _dispatch_client_callout4 + 20 13 libdispatch.dylib 0x0000000101627eac _dispatch_mach_msg_invoke + 512 14 libdispatch.dylib 0x000000010161226c _dispatch_lane_serial_drain + 352 15 libdispatch.dylib 0x0000000101628ea4 _dispatch_mach_invoke + 492 16 libdispatch.dylib 0x000000010161226c _dispatch_lane_serial_drain + 352 17 libdispatch.dylib 0x0000000101613290 _dispatch_lane_invoke + 460 18 libdispatch.dylib 0x00000001016206fc _dispatch_root_queue_drain_deferred_wlh + 328 19 libdispatch.dylib 0x000000010161fd0c _dispatch_workloop_worker_thread + 580 20 libsystem_pthread.dylib 0x0000000211998680 _pthread_wqthread + 288 21 libsystem_pthread.dylib 0x0000000211996474 start_wqthread + 8 ) *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'DocumentManager service tried to send a message to a deallocated host proxy' Steps to Reproduce Present a UIDocumentPickerViewController inside a custom UIViewController. Dismiss the parent UIViewController before UIDocumentPickerViewController is fully visible. Swipe down or press the “Cancel” button in the picker. Occasionally, the system forcefully terminates the view service, causing a crash. Workarounds Tried (Unsuccessful) Using UIAdaptivePresentationControllerDelegate – Not Called for UIDocumentPickerViewController. Using viewDidDisappear to clean up – Not Called when the system terminates the picker. Forcing dismissal before presenting a new picker Reference to Line 42 in DOCRemoteViewController.m From the error traceback, we see a reference to DOCRemoteViewController.m line 42, which strongly suggests that UIDocumentPickerViewController relies on a background process to manage its lifecycle. Since we don’t have access to Apple’s private code, we assume that the DocumentManager service is trying to send a message to an already deallocated instance of UIDocumentPickerViewController, leading to a crash. One of the example wrapper implementation of us: class DocumentPickerViewController: UIViewController, UIDocumentPickerDelegate { private var picker: UIDocumentPickerViewController? weak var delegate: UIDocumentPickerDelegate? override func viewDidLoad() { super.viewDidLoad() print("📄 DocumentPickerViewController - viewDidLoad() called") setupDocumentPicker() } override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) print("📄 DocumentPickerViewController - viewDidAppear() called") } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) print("📄 DocumentPickerViewController - viewWillAppear() called") } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) print("📄 DocumentPickerViewController - viewWillDisappear() called") } override func viewDidDisappear(_ animated: Bool) { super.viewDidDisappear(animated) print("📄 DocumentPickerViewController - viewDidDisappear() called") } deinit { print("🗑 DocumentPickerViewController - deinit() called") } // MARK: - Setup Document Picker private func setupDocumentPicker() { picker = UIDocumentPickerViewController(forOpeningContentTypes: [.pdf]) picker?.delegate = self picker?.allowsMultipleSelection = false picker?.modalPresentationStyle = .formSheet if let picker = picker { present(picker, animated: false) { print("📄 Document Picker fully presented") } } } // MARK: - UIDocumentPickerDelegate Methods func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) { print("✅ User selected document(s): \(urls)") delegate?.documentPicker?(controller, didPickDocumentsAt: urls) dismissSelf() } func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) { print("❌ User cancelled document selection") delegate?.documentPickerWasCancelled?(controller) dismissSelf() } private func dismissSelf() { DispatchQueue.main.async { [weak self] in self?.dismiss(animated: true) } } } And logs for this implementation: 📄 Document Picker fully presented 📄 DocumentPickerViewController - viewDidAppear() called ❌ User cancelled document selection The view service did terminate with error: Error Domain=_UIViewServiceErrorDomain Code=1 "(null)" UserInfo={Terminated=disconnect method} 📄 DocumentPickerViewController - viewDidLoad() called 📄 Document Picker fully presented 📄 DocumentPickerViewController - viewDidAppear() called would appreciate any workarounds from the community to prevent crashes related to this issue!