On devices running iOS 18+, when a web app kiosk policy is pushed via an MDM and the device is restarted. The touch screen doesn't respond on the device. So the device is currently in a brick state. Since we can't enter the password we can't get the logs from the device and it is even hard to recover the device. On restart the device isn't connecting to the internet so it isn't possible to remove the kiosk policy as well. This only happens on devices running iOS 18+ and with web app kiosk profile.
Device touch screen not responding after restart
It appears you're trying to report an issue iOS 18. The developer forums aren't a good means to do that. Please file feedback at https://feedbackassistant.apple.com/ with as much technical detail as you can provide.
I understand that in this case you likely won't be able to provide a sysdiagnose, but other information would be useful. For instance, please indicate whether you can reproduce the issue, provide all the commands and configuration profiles sent to the device, the exact iOS version running on the device, and so on.