I have an iPhone 6S Plus and have had all of the iOS 9.3 betas and installed the iOS 9.3 that was released today. I have a house that consists of 6 members (including me, which I am the main user), 25 Philips Hue Lights, a Honeywell Lyric Round Thermostat, 3 First Alert Smoke/CO sensors, and an Elgato Eve device. Of the 6 people in my HomeKit house: Me: iPhone 6S Plus (iOS 9.3), iPad Air 2 (iOS 9.3), iPad Mini 4 (iOS 9.3) My Mom: iPhone 6S Plus (iOS 9.3) My Dad: iPhone 6 Plus (iOS 9.3) My Brother: iPhone 6 Plus (iOS 9.3), iPad Air 2 (iOS 9.3) My Brother: iPhone 6 Plus (iOS 9.3), iPad 4 (iOS 9.3) My Brother: iPad Air 2 (iOS 9.3) Everyone was able to properly access my HomeKit home up until about Friday or Saturday night. My Mom is now the only person that is unable to access the HomeKit house. I cancelled her as a person in the house and resent her the request. That fixed the issue, but only temporarily until Monday. Earlier yesterday (Monday, March 21), my Mom informed me that from her Eve app, she no longer had access once again. I once again removed her as a user in the house and sent her an invitation. She said she accepted the new invitation, but my phone informed me that it was still waiting for confirmation from my Mom to accept. I waited about 20 minutes, but it still said she needed to accept it. From my Mom's phone, it showed that she had her own HomeKit house that needed to add its first accessory to and also and had an invitation from me to join my HomeKit house. Hours later, nothing has changed. She is the only person that does not have access to the HomeKit house. I then tried this: I removed her as a user once again, then I had her reset her HomeKit configuration, I waited 5 minutes, and then I added her again and she accepted the invitation, but again, it did not work. Has anyone else experienced any issues like this with HomeKit? Or have any ideas to fix it? We love HomeKit and I realize it is still new technology, but this had not been an issue until a few days ago. Sadly, I am away at IU and will not be home until May, so I cannot reset my HomeKit configuration because then we would have to setup the devices again and I am not home to do that.