You should perform a "reset all settings". That is known to resolve lots of strange issues such as you have mentioned. It leaves your data intact but you do have to set settings back up like you want them, add back Wi-Fi networks etc. Not too bad though and can be done in a few minutes. To be clear this in NOT an "erase and restore" option but simply resets settings to the new iOS version defaults.Hello.
since dev beta1 no really big problems. but now on my ip12pro and RC installed, no third party app settings are visible inside the settings app. even it is not possible to jump into any third party settings via the search field. i deactivated the screen time code for some restrictions, but nothing worked...