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