Yes, unfortunately attempting to add the devices with the 6 digit hardware address with Insteon+ causes it to not work properly. It's an issue with the Insteon+ app. We found that adding devices with the Set button and completely avoiding the Insteon+ app makes the devices work properly in the Home app and the Apple Watch, so I'm hoping there's a way to remotely press the Set button per se with an ISY, basically remotely invoking whatever the set button does without physically pressing the set button or typing in the 6-digit hardware address.