This is a longshot, but it's worth a try I guess: I share my HomeKit config over iCloud to two devices: an iPhone and an iPad. At some point, through adding and changing some devices, I wound up with a corruption on the iPad alone. A Lutron SmartBridge and all of its devices are fully reachable on my iPhone. On my iPad, the bridge and all devices are "not reachable." I cannot delete the bridge from the iPad as it comes right back. If I delete it on my iPhone, it remains on the iPad. I know I could resolve this if I reset the entireHomeKit configuration in the privacy settings. However, this would reset the config on my iPhone as well. I don't want to do that because I have over 100 devices, and it would be a nightmare to setup again. (Here's a video showing some of them.) Having to reset the entire HomeKit configuration due to these minor problems is going to become unfeasible for users the more devices they have. (One should not have to blow up the entire thing every time there's a problem, but I disgress). This problem survived restoring from a backup when I got my new iPad Pro instead of the iPad air 2 I had before, when the problem started. I suppose I could do a clean restore on my iPad. But that, too, is more than I want to do. Does anyone know precisely where in the filesystem this HomeKit data is stored? One can sometimes manipulate data in their iTunes backups using a tool like iBackupBot: http://9to5mac.com/2016/04/09/how-to-backup-restore-sms-texts-imessages-clean-ios-install/ I'm wondering if I could back up my iPad, delete the folder containing the HomeKit configuration from just the iPad, then restore that back up. At that point maybe it would repopulate the correct data.