iOS 13 Beta 4, iPhone Xs.
I'm seeing the power alert show even though the options are not specified. I have created a feedback/radar for this: FB6810811
If this is the new behavior to expect for GM, the default init documentation should be updated accordingly. Seems like a bug to me as there is a second initializer to explicitly invoke this behavior.
import UIKit
import CoreBluetooth
class ViewController: UIViewController {
let centralManager: CBCentralManager = CBCentralManager(delegate: nil, queue: .main)
}