** Maybe important things **: I have a smart home running with Apple Homekit at home (I also use a [Homebridge](https://homebridge.io/) runs on a [qnap nas](https://www.qnap.com/de-de/product/ts-253a) here, if that matters), I was not listed as an owner in Homekit, I was a guest, but I was able to edit the accessory. Home Hub is an iPad Air 1 (running iOS 12.5.4) I think and I tried everything on iPhone X and iPad Air 4 (both running [IOS 15 Dev Beta](https://betaprofiles.com)) ** Problems **: Some things didn't work, when I tried to change a light in another room, it didn't just work on the iPad, which is the home hub, the same thing with automation, but activation and deactivation worked well. Also, in the settings, it didn't show the right person I was in this house with. ** What happened that made me have the problem now **: I tried to solve my problem by adding the iPad as a home hub, but this didn't work, so I thought I could leave the house and invite from iPad Air 1 back into it, now I wanted to do that and on my old iPhone 6 it works for 30 minutes or something and then I am kicked out again on the other 2 devices when I tried to accept the invitation, there is only one charge cycle on the accept button and when it disappeared nothing happened ** What I tried **: I tried to restart all devices, I tried to delete iPad Air 1 as Home Hub, I tried to disconnect / and I tried disabling iCloud, but then the Home app doesn't work ** If any of you have an idea on how to fix the problem or are a professional or something, please help me ** (sorry for all of you who read all of it)