I’m seeing a Bluetooth call audio routing issue on a new iPhone 17 Pro running iOS 26.5.1, build 23F81. Bluetooth media audio works normally. Music and video audio stay on Bluetooth headphones without issues. The problem appears only when the device switches into call audio / HFP mode. Tested with multiple earbuds: Samsung, OPPO, Huawei and CMF Buds Pro 2. The behavior is similar with all of them. There are no other Bluetooth devices connected. Call Audio Routing is already set to Bluetooth Headset in Accessibility settings. The issue affects cellular calls, FaceTime Audio, Telegram and Signal. In some cases the earbuds seem to switch into call mode, but the call audio route falls back to the iPhone receiver or speaker instead of staying on the Bluetooth headset. After the call ends, Bluetooth media audio returns normally. I captured a sysdiagnose right after reproducing the issue. Relevant observations from the logs: Device: iPhone18,2 iOS: 26.5.1 Build: 23F81 Sysdiagnose time: 2026-06-03 11:22:03 +0300 In Bluetooth/CoreCapture/bluetooth_status.txt, Bluetooth was ON 3 paired devices were present 1 device was connected Connected device at the time: CMF Buds Pro 2 So the headset was not simply disconnected from the phone. In the powerlog, before the call the audio route was HeadphonesBT for media playback. Around the FaceTime Audio test, HeadsetBT / PhoneCall appeared, but then the route moved to ReceiverAndMicrophone / Speaker instead of staying on HeadsetBT. During a later cellular call, the active PhoneCall route was also ReceiverAndMicrophone rather than HeadsetBT. After the call ended, the route returned to HeadphonesBT for media playback. This looks like the Bluetooth connection remains alive, but call audio / HFP routing fails. The same sysdiagnose also contains CentauriFirmwareEvent entries under crashes_and_spins from the previous day. They show: subsystem = BT host-reason = firmware crash BTMAIN panic faulting_task = link_manager_thread LMAC_5G watchdog expired SCAN watchdog expired These firmware crash events do not happen at the exact same timestamp as the call test, so I’m not claiming that every call directly crashes Bluetooth firmware. But the sysdiagnose shows both incorrect Bluetooth call audio routing and separate BT firmware crash events. Has anyone seen similar behavior on iPhone 17 / iOS 26 with Bluetooth HFP call audio? Could this be a known iOS 26 / Apple N1 / Bluetooth firmware issue, or does it look more like a hardware defect of this particular device?

hello We found that our app had a lot of crashes on iOS 26. The crash stack showed [CBXpcConnection _sendBarrier]. The following is the crash log: Thread 0 name: com.apple.main-thread (cpu_usage: 0.00%) 1 libsystem_kernel.dylib _semaphore_wait_trap (in libsystem_kernel.dylib) 2 libdispatch.dylib __dispatch_sema4_wait (in libdispatch.dylib) 3 libdispatch.dylib __dispatch_semaphore_wait_slow (in libdispatch.dylib) 4 CoreBluetooth -[CBXpcConnection _sendBarrier] (in CoreBluetooth) 5 CoreFoundation ___CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ (in CoreFoundation) 6 CoreFoundation ____CFXRegistrationPost_block_invoke (in CoreFoundation) 7 CoreFoundation __CFXRegistrationPost (in CoreFoundation) 8 CoreFoundation __CFXNotificationPost (in CoreFoundation) 9 Foundation -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) 10 UIKitCore ___47-[UIApplication _applicationDidEnterBackground]_block_invoke (in UIKitCore) 11 UIKitCore +[UIViewController _performWithoutDeferringTransitionsAllowingAnimation:actions:] (in UIKitCore) 12 UIKitCore -[UIApplication _applicationDidEnterBackground] (in UIKitCore) 13 UIKitCore ___101-[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:]_block_invoke_2 (in UIKitCore) 14 UIKitCore __UIScenePerformActionsWithLifecycleActionMask (in UIKitCore) 15 UIKitCore ___101-[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:]_block_invoke (in UIKitCore) 16 UIKitCore -[_UISceneLifecycleMultiplexer _performBlock:withApplicationOfDeactivationReasons:fromReasons:] (in UIKitCore) 17 UIKitCore -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:] (in UIKitCore) 18 UIKitCore -[_UISceneLifecycleMultiplexer uiScene:transitionedFromState:withTransitionContext:] (in UIKitCore) 19 UIKitCore ___186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke (in UIKitCore) 20 UIKitCore +[BSAnimationSettings(UIKit) tryAnimatingWithSettings:fromCurrentState:actions:completion:] (in UIKitCore) 21 UIKitCore __UISceneSettingsDiffActionPerformChangesWithTransitionContextAndCompletion (in UIKitCore) 22 UIKitCore -[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] (in UIKitCore) 23 UIKitCore __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke.218 (in UIKitCore) 24 UIKitCore -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] (in UIKitCore) 25 UIKitCore -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] (in UIKitCore) 26 UIKitCore -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] (in UIKitCore) 27 FrontBoardServices __76-[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:]_block_invoke.129 (in FrontBoardServices) 28 FrontBoardServices -[FBSScene _callOutQueue_maybeCoalesceClientSettingsUpdates:] (in FrontBoardServices) 29 FrontBoardServices -[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:] (in FrontBoardServices) 30 FrontBoardServices __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2.cold.1 (in FrontBoardServices) 31 FrontBoardServices ___94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2 (in FrontBoardServices) 32 FrontBoardServices -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] (in FrontBoardServices) 33 libdispatch.dylib __dispatch_client_callout (in libdispatch.dylib) 34 libdispatch.dylib __dispatch_block_invoke_direct (in libdispatch.dylib) 35 BoardServices ___BSSERVICEMAINRUNLOOPQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ (in BoardServices) 36 BoardServices _BSServiceMainRunLoopSourceHandler (in BoardServices) 37 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (in CoreFoundation) 38 CoreFoundation ___CFRunLoopDoSource0 (in CoreFoundation) 39 CoreFoundation ___CFRunLoopDoSources0 (in CoreFoundation) 40 CoreFoundation ___CFRunLoopRun (in CoreFoundation) 41 CoreFoundation __CFRunLoopRunSpecificWithOptions (in CoreFoundation) 42 GraphicsServices _GSEventRunModal (in GraphicsServices) 43 UIKitCore -[UIApplication _run] (in UIKitCore) 44 UIKitCore _UIApplicationMain (in UIKitCore) Thanks

Hi, we have developed an application that streams data from two BLE peripherals at a rate of 14.5kbps per peripheral. Until now, our devices streamed in near real time with no lag on all Apple devices with Bluetooth 5.0 or greater. Since the release of the iPhone 17 series and the iPad A16, we have reports from users of the data being streamed at significantly lower rates than expected. Any help here would be greatly appreciated as our customers are being affected by this change.

Hi! I'm trying to create an iOS peripheral service with UUID=180F which stands for standard GATT BAS. I'm getting the error: CBErrorDomain Code=8 "The specified UUID is not allowed for this operation." Is this prohibited by the system?

Hi all, I'm encountering a BLE issue with the newer iPad models featuring the A16 Bionic chip (e.g., iPad 11th Gen). I have an iOS application that runs as a BLE peripheral, and it used to work flawlessly with various central devices. 📱 Device Specs Model: iPad (A16 Bionic) OS: iPadOS 18.6 ✅ Working Setup (Before): iOS app acts as a BLE peripheral (advertises a custom service). Central device (Windows/Linux/Android) could: Discover advertisements Connect to the peripheral Exchange MTU Discover GATT services Communicate bidirectionally ❌ Issue with iPad A16 (Newer Devices): Central device receives advertisements and connects. MTU exchange request is sent by central, but iPad A16 does not respond. The BLE link remains active but only transmits empty PDUs, and communication never proceeds. Same issue observed with third-party apps like BLE HID keyboard — they also fail to connect or communicate on A16 iPads but work on older devices (e.g., iPad 10th Gen and below). 🔍 Debugging So Far: Confirmed that MTU Exchange Request is compliant (Client Rx MTU = 527). Works fine with iPad 10th Gen and earlier. Works with Android, Windows, and even Linux central stacks with older iPads. A16-based iPads seem to silently drop or ignore the MTU request. 🧪 Suspected Cause: Possible regression or behavioral change in LE Privacy handling on newer iPads. Possibly tied to iPadOS version or Bluetooth controller firmware. 🙏 Looking for: Anyone else facing similar BLE issues on iPads with A16? Any known changes to BLE LE Privacy, MTU negotiation, or connection behavior in iPadOS on A16 devices? Any workarounds, entitlements, or configuration changes that fixed the issue? Would appreciate any insights or suggestions. Thank you!

I am trying to use BLE in Flutter. I have the following three questions regarding BLE connections: At what point in iOS is the ATT MTU negotiation considered complete after a BLE connection is established? Is there an official callback or state that indicates the completion of the negotiation? Is the value used by iOS during ATT MTU negotiation fixed? If it is fixed, please tell me that value; if it varies, please tell me the conditions under which it varies. If anyone knows the answer, please let me know.

I'm developing an iOS application that relies on peer-to-peer discovery and connection using Bluetooth. The expected behavior is: Two iOS devices with the application installed. Both users marked as "visible". When within Bluetooth range, the devices should discover each other and establish a connection. However, the problem occurs when: The application is in the background (minimized) OR The device is locked (screen off). In these states: The devices can no longer be detected. The search returns no nearby devices. Connection could not be established. ChatGPT: What you want to do probably runs into a structural limitation of iOS — it's not a bug. And iOS: severely limits background BLE scanning. reduces advertising frequency. may even stop completely depending on the state (lock screen). In other words: 👉 iPhone was not designed to function as a "continuous radar" between background apps. Apps that do something similar (like AirDrop or Find My): use Apple's private or privileged APIs or combine BLE + Wi-Fi + Ultra Broadband. i need help : /

I'm scanning for peripherals, and keep references to multiple CBUUIDs - one for each peripheral. I then start a connection to the peripheral. I never get a callback to say the connection succeeded, failed, or disconnected. I have a Mini-Moreph Bluetooth sniffer. The sniffer shows that the iPhone never tried to connect to any of the peripherals. The iPhone HCI logs show that a create connection request was sent, but a cancel connection request was sent 0.018 seconds later. No feedback was given to my application through CoreBluetooth. I've filed this through Feedback Assistant, but expect nothing will come of the report.

when we launch the application and change the language from german/french to english or any other language then in also it is changing app language, but bluetooth connection screen with pair or cancel alert is showing on previous selected language. Since that alert is system alert, is there any wayto debug/resolve that issue.

I have a question regarding cold start and pre-warming behavior on iOS. I’m developing a SwiftUI app that continuously receives data from a BLE device in the background. We’ve observed that after the BLE stream stops, the OS often terminates our app. Later, when the sensor comes back into range, iOS appears to relaunch (or reinitialize) the app. In our app, we use a WindowGroup like this: WindowGroup { AppView(store: store) } We’ve placed our BLE reconnection logic inside a .task modifier in AppView. What’s confusing is this: Most of the time, when the app is relaunched, AppView is created and the .task runs as expected. However, in about 1 out of 10 cases, AppView is not created at all, so the .task does not execute. I’m trying to understand: Under what conditions does iOS relaunch an app without fully initializing the SwiftUI view hierarchy? Is this related to pre-warming or background relaunch mechanisms (e.g., CoreBluetooth state restoration)? What determines whether the WindowGroup and root view are actually instantiated? Any insight into the system’s relaunch behavior or lifecycle in this scenario would be greatly appreciated.

Hi everyone, I'm developing a standalone Matter controller app on iOS 18+ using Apple's Matter.framework directly — without integrating with Apple Home or HomeKit. We manage our own Matter fabric and handle the full commissioning flow ourselves. Current setup: BLE-based Matter device discovery and commissioning via Matter.framework Own fabric management (not adding devices to Apple Home) During development, we rely on the "Bluetooth Central Matter Client Developer Mode" profile to enable BLE access The challenge: As we approach our App Store release, we need end users to be able to commission Matter devices without installing any developer profiles. I'm trying to figure out the correct entitlement path for a non-HomeKit Matter controller app in production. Questions: Which entitlements are required for a third-party Matter controller app using Matter.framework directly (not via HomeKit) to work in production? Is there a formal entitlement request process for something like com.apple.developer.matter.allow-setup-payload? If so, where do we initiate it? Are there additional program memberships or certifications required beyond the standard Apple Developer Program membership? We've gone through the Matter framework documentation and relevant WWDC sessions but haven't found a clear answer specifically for non-HomeKit standalone Matter controller apps. Would appreciate any input from Apple staff or developers who've shipped a similar app. Happy to provide more details if needed. Tagging for visibility: @Apple or relevant team — this involves a non-HomeKit Matter.framework usage pattern and entitlement approval process.

I'm developing an accessory that communicates with iOS/iPadOS via Bluetooth Low Energy and observed some odd behavior. My accessory (peripheral) requests more forgiving BLE connection parameters from the OS (central). The request is initially accepted, but then immediately overwritten by the central with the default parameters. This ultimately leads to a an endless loop of negotiating parameters that eventually results in the peripheral getting overwhelmed and disconnecting. The first solution I tried was simply going along with the central's parameters, but this proved to be less than optimal, as there were still sporadic disconnects. As best as I can tell, the parameters I'm requesting are compliant with Apple's spec (please correct me if I'm wrong): Minimum Connection Interval: 30ms Maximum Connection Interval: 60ms Peripheral Latency: 30 Supervisory Timeout: 6s So my question is this: Is there some mechanism that's causing the central to continuously renegotiate connection parameters, and is there anything I can do inside my accessory to avoid it?

I'm working with an Espressif ESP32-C5 device. The firmware on the device is based on Espressif's base software, which provides Wifi provisioning services via Bluetooth. My firmware also provides its own Bluetooth services too. When the Espressif part of the firmware connects to Wifi, it re-initializes the entire Bluetooth stack, eliminating all of its own services. Mine get added back, but my app starts failing and doing weird things at this point. I believe it is due to iOS caching the GATT configuration and not recognizing that it has changed. If I restart my phone, the problem is cleared. But this is not a good solution to the problem. I need a way to let iOS know that it should clear any cached information related to this device. How can I do that?

I am trying to find out about the availability of BLE scanning for advertisements when a watchOS app (on watchOS 26.4 with CoreBluetooth) which starts running a HKWorkoutSession becomes dimmed, ie. due to the user lowering their arm. From my understanding there is still availability for ongoing scanning whilst in the dimmed mode. If this is correct, what settings are required (e.g. using background capability for 'Workout Processing', 'bluetooth-central', etc), and does scanning whilst in background mode limit to requiring service uuids in scanForPeripherals? Also if scanning is throttled, is there an 'estimated' inter scan time? Thanks

Hello dear Apple Platform Engineers, I'm working on an iOS App that connects to a Bluetooth Low Energy Peripheral in the foreground. Whenever the App moves into Background, we want to continue syncing data & therefore implemented State Restoration to be informed about Discovery, Connect, Disconnect or Characteristic changes in the Background in order to wake the App up whenever it was "Terminated due to memory issue". I consulted https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/CoreBluetoothBackgroundProcessingForIOSApps/PerformingTasksWhileYourAppIsInTheBackground.html#//apple_ref/doc/uid/TP40013257-CH7-SW1 for this & assigned: CBCentralManagerOptionRestoreIdentifierKey Reinstantiate the dedicated CentralManager & implemented the centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) Delegate Additionally, I assigned the following keys on connect(_ peripheral: CBPeripheral, options: [String : Any]? = nil) CBConnectPeripheralOptionNotifyOnConnectionKey CBConnectPeripheralOptionNotifyOnDisconnectionKey CBConnectPeripheralOptionNotifyOnNotificationKey However, from my experience the App gets woken up, but neither the willRestoreState nor the didDiscover, didConnect or didDisconnectPeripheral is called even though launchOptions?[UIApplication.LaunchOptionsKey.bluetoothCentrals] as? [String] is not empty. What might I be missing when trying to make this approach work? Thanks a lot for any insights & support!

I'm integrating AccessorySetupKit for BLE earbuds discovery and running into an issue with ASDiscoveryDescriptor configuration. Our earbuds don't have a fixed Bluetooth SIG company identifier. So I'm trying to use bluetoothNameSubstring + bluetoothServiceUUID instead. However, this combination never discovers any devices. The picker appears but stays empty. As soon as I add a bluetoothCompanyIdentifier, the device is found instantly. I reproduced this with my Bose QC35 II as well, so it's not specific to our hardware. My configuration: bluetoothServiceUUID: set to our custom UUID bluetoothNameSubstring: set to a substring matching the advertised device name NSAccessorySetupBluetoothServices + NSAccessorySetupBluetoothNames both set in Info.plist supportedOptions: .bluetoothPairingLE iOS 26.3.1, iPhone 11 The documentation doesn't mention that bluetoothCompanyIdentifier is required. Is bluetoothCompanyIdentifier actually required for BLE discovery? If so, is there a recommended approach for devices that don't have a fixed company identifier?

Device Info: Device: iPad Pro 2022 (M2) OS: iPadOS 26.4 Network: 5GHz Wi-Fi Accessory: Apple Pencil (2nd Generation) Issue Description: Since updating to iPadOS 26, I experience periodic ping spikes during online gaming whenever Bluetooth is enabled. Since I use an Apple Pencil which requires Bluetooth, the issue affects me constantly during gaming sessions. Simply turning off Bluetooth in Settings does not fix the problem — the only way to temporarily restore normal ping is to turn off Bluetooth and then fully reboot the device. My Wi-Fi connection itself is fine, and other devices on the same 5GHz network have no issues. What I've Already Tried: Confirmed Wi-Fi is on 5GHz band (not 2.4GHz) Turning off Bluetooth + rebooting the device (temporary fix only, not a permanent solution) Reset network settings Updated to the latest iPadOS version (26.4) Important Background: When iPadOS 26 first launched, Apple Support provided a Configuration Profile that resolved the issue upon installation. However, the profile expired after approximately one week, and the problem has persisted ever since — never fixed by any subsequent update. I am currently on iPadOS 26.4 and the issue remains. My Questions: Has anyone else experienced this? Are there any known workarounds? Has Apple released an updated Configuration Profile or announced a fix for this specific issue?

Hi, and apologies for a long post! We have created an app that enables wireless communication with FIDO2 devices over Bluetooth by creating virtual HID devices and translating the packages. In order to do this, we use the HIDVirtualDevice class as described here: https://developer.apple.com/documentation/corehid/creatingvirtualdevices We learned the hard way that this sample code does not work without the “com.apple.developer.hid.virtual.device“ entitlement, but with it, it behaves as expected. Now, our application has been rejected during Review, both by the initial App Review and the appeal to the App Review Board. The problem is that I can’t really figure out what the issue is. The first rejection states the following: The app requests access to Accessibility features on macOS but does not use these features for accessibility purposes. Specifically, the app uses Accessibility features for non-accessibility feature. (Please see attached screenshot) The attached screenshot is of the screen the app shows when requesting permissions, with this code: else if bluetoothManager.requirePermissions { GradientTitle(text: "PERMISSIONS \nNEEDED") Text( """ This application requires additional permissions to run. Open the settings menu to allow access before restarting the application. """ ) and a button with this action: if let url = URL( string:"x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility" ) { NSWorkspace.shared.open(url) } The requirePermissions boolean is set from here, let properties = HIDVirtualDevice.Properties( descriptor: VirtualDevice.fidoDescriptor, vendorID: VirtualDevice.vendorId ) if HIDVirtualDevice(properties: properties) != nil { await MainActor.run { self.requirePermissions = false } break } else { await MainActor.run { self.requirePermissions = true } When HIDVirtualDevice(properties: properties) is called, a system pop-up with App would like to control this computer using accessibility features. Grant access to this application in Security and Privacy preferences located in System Preferences. shows. I responded to the rejection by trying to argue that allowing you to use your device wirelessly does increase accessibility, and that this is the only purpose of the app. Their response was: Regarding 2.4.5, Accessibility usage. To resolve this issue, it would be appropriate to remove Accessibility usage for non-accessibility purposes. Should you require more assistance with resolving this issue, Apple Developer Technical Support is available to provide direct one-on-one support for discrete code-level questions. Please be sure to include any crash logs, screenshots or steps to reproduce this issue in your request. I contacted technical support and tried to explain the issue again, and got the following response: Guideline 2.4.5 - Performance The app requests access to Accessibility features on macOS but does not use these features for accessibility purposes. Specifically, the app uses Accessibility features for non-accessibility feature. Accessibility features are intended to help users with different capabilities interact with their devices and app. Apps may not use features designed to increase accessibility for other purposes. We understand that the reason for using Accessibility feature on macOS. However, the usage is not compliant with the provided guideline. The last sentence is not complete, and it’s hard to understand what the issue is, given that they have not actually responded to my arguments. My best guess right now is point 2.4.5 (v): 2.4.5 Apps distributed via the Mac App Store have some additional requirements to keep in mind: (v) They may not request escalation to root privileges or use setuid attributes. If this is the case, I can understand the rejection, although it’s strange they didn’t just say so then. If that is correct, given that the system pop-up and accessibility requirement also trigger when running their sample code (which creates a virtual keyboard), does that mean that no one using this class and framework can submit apps to the App Store? I never intended to use an accessibility framework, and I was quite surprised the first time the pop-up appeared. RIght now I'm just confused and dissapointed with the level of feedback from Apple, and would appreciate any help, either in providing a solution or just explaining what the specific issue is.

Recently, we have received continuous feedback from users that the Bluetooth key and digital key are not working properly or are not functioning; Through analysis of App logs, it was found that after the iOS system locks the screen, the iBeacon background keep-alive function fails, Bluetooth connection also fails, and system callbacks cannot be obtained; the digital key also fails, and it fails simultaneously with the Bluetooth key; We have checked the specific permission configuration and it aligns with the recommended configuration in the official documentation, with no abnormalities. Although this type of issue is not a widespread problem, it has been continuously reported by users and is very troublesome. Does the official team have a clear explanation? Why are both Bluetooth keys and digital keys affected after the app is locked? Digital keys should be less affected. The following is a log analysis of a certain user 1: Step 2, the App entered the background; Step 3, the App's Bluetooth was disconnected; 3-4 The App remained in the background for 5 hours before being launched again 2: This type of issue is due to the system disconnecting the Bluetooth connection when the app enters the background; most likely, the app has been killed by the system when the user gets out of the car, and it has not been revived; the car key also does not work; During the time period from 2026-03-23T17:59:33 to 2026-03-23T21:23:49, why didn't carkey work properly 1：2026-03-23T16:52:11.676+08:00 new_carkey: key:, rssi:-89, AUTH_OK 2：2026-03-23T17:55:51.782+08:00 new_carkey: AppMonitor appDidEnterBackground bleStatus: success(Nimbus.NIOCarBLEKey.State.connected) 3：2026-03-23T17:59:33.747+08:00 new_carkey: ibeacon: didExitRegion, vid: NIO BLE Key, uuid: *** bleStatus: failure(Error Domain=CBErrorDomain Code=15 ""Failed to encrypt the connection, the connection has timed out unexpectedly."" UserInfo={key_device_name=NIO Key 0201 , NSLocalizedDescription=Failed to encrypt the connection, the connection has timed out unexpectedly., vehicle_id=}) " 4：2026-03-23T21:23:49.920+08:00 new_carkey: AppMonitor appDidFinishLaunching: [:] bleStatus: success(Nimbus.NIOCarBLEKey.State.disconnected) 5：2026-03-23T22:01:51.235+08:00 new_carkey: key:****, rssi:-90, AUTH_OK

Hello, I am developing with the Nearby Interaction framework using third-party UWB accessories (Murata SR040/SR150). I observed a difference between U1-based and U2-based iPhones: iPhone 12 Pro (U1 chip) NINearbyObject.direction returns valid 3D vector (x, y, z). Distance and direction both work as expected. iPhone 15 Pro and iPhone 16 Pro (U2 chip) NINearbyObject.direction is always nil. Only distance is returned (around 0.35–0.40 m in my test). Effectively behaves as "distance-only mode". Environment: Hardware: iPhone 12 Pro, iPhone 15 Pro iOS version: 18.5 Accessory: Murata UWB SR040 / SR150 App: Using NINearbyAccessoryConfiguration with BLE-based discovery Info.plist includes NSNearbyInteractionUsageDescription Camera assistance was tested both ON and OFF Expectation: I expected the U2 chip to behave consistently with U1, i.e. provide direction vectors when possible. Instead, on iPhone 15 Pro, direction is always unavailable (nil) while distance is returned correctly. Questions: Is this an intentional limitation for U2 chip + third-party accessories? Is there a new requirement (e.g. certification, firmware update, capability flags) to enable direction on U2 devices? Could this be related to NIDeviceCapability or the new Extended Distance Measurement (EDM) mode in U2? Thanks in advance for any clarification.