[iOS 18] Initializing CBCentralManager doesn't trigger prompting Bluetooth permission sometimes

The issue

While testing how our app behaves on iOS 18 beta 6, we found an issue on one of our iPhones:

• At some point, the app creates CBCentralManager in order to trigger an alert to request Bluetooth permission;
• The alert is not shown;
• centralManagerDidUpdateState never gets called, the state is always .unknown.

Below is a sample code I used to reproduce it easier:

class ViewController: UIViewController, CBCentralManagerDelegate {
    var centralManager: CBCentralManager?
    @IBOutlet weak var stateLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        print("Test app ready")
    }
    
    @IBAction func onPressedRequestPermission(_ sender: Any) {
        self.stateLabel.text = "Requested BLE permission"
        centralManager = CBCentralManager(delegate: self, queue: nil)
    }
    
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        var stateString = ""
        switch central.state {
        case .poweredOn: stateString = "poweredOn"
        case .unknown: stateString = "unknown"
        case .resetting: stateString = "resetting"
        case .unsupported: stateString = "unsupported"
        case .unauthorized: stateString = "unauthorized"
        case .poweredOff: stateString = "poweredOff"
        @unknown default: stateString = "unknownDefault"
        }
        
        print("CBCentralState changed: \(stateString)")
        self.stateLabel.text = "CBCentralState: \(stateString)"
    }
}

I ran this code on two devices - one with the issue and one without it, and compared the logs from Console. I noticed that the last similar logs were

15:44:25.428118+0200	tccd	AUTHREQ_PROMPTING: msgID=8163.2, service=kTCCServiceBluetoothAlways, subject=Sub:{...

After that, the bug-free device printed this within the next ~250ms:

15:44:25.432285+0200	SpringBoard	Asked to bootstrap a new process for handle: [osservice<com.apple.tccd>:8144]
...
15:44:25.675380+0200	SpringBoard	Received request to activate alertItem: <SBUserNotificationAlert: 0xc4289cf00; title: Allow “test1” to find Bluetooth devices?; source: tccd; pid: 8144>

and showed the request for Bluetooth permission. At the same time, there were no such logs on the problematic device, and the request was not displayed.

Other apps behavior

nRF Connect app cannot request Bluetooth permission too on the same device. Usually it does that immediately after the first launch, but this time we saw only an error "Your device reports an unknown error for Bluetooth use." and no BT request alert.

The question

How can we programmatically detect that there is some unknown issue with Bluetooth in a similar way how nRF Connect does that?