We are experiencing this on Monterey. The Bluetooth Core Framework has changed significantly. I hope apple will fix it ASAP.

It seems to be broken on Monterey 12.0.1. after registration with registerForConnectNotifications no notification is trigged. However our code worked for many years since OSX 10.7-11.4.

Hi, I have the same problem with our BT devices. https://developer.apple.com/forums/thread/694146?login=true&r_s_legacy=true

Here same problem "No name or address" in the console log. https://developer.apple.com/forums/thread/692615?answerId=692763022 The Bluetooth Core on Monterey is buggy.