After upgrade and first new start the menu settings 'network and internet' are opening very slowly (nearly freezing) and I can't start WiFi. After restarting no change in bahavior. If I'm not navigating in menu settings 'network and internet' and not trying to activate wifi, new os is running without any problems, as far as I know.
Waiting for Update or is there another solution possible?
Now, after having the problem for more than 24 hours, writing this post, suddenly I can switch on WiFi and it's running fine.
Problem solved by waiting...