iOS 12 update glitch

I would restore to factory conditions and set it up as new.

Like welafever said, reset all settings and content is all I can think of. Make sure you have a good backup before you factory reset it. The best time to upgrade my device is when they have ironed out most of the bugs. Early adopters are brave souls who volunteer to be Apple's guinea pigs. I just upgraded from 10 to 11 a few days ago. My upgrade from 9 to 10 and 11 are all one shot and problem free. They're all done right before a major iOS release becomes available. Won't be allowing 12 until at least summer next year.

you are welcome.

For the apps, you now need to swipe up and then pause before releasing the screen : https://help.apple.com/ipad/12/#/iPad619935ea

1. To see all your open apps in the App Switcher, do one of the following:

• Swipe up from the bottom edge and pause in the center of the screen.
• Double-click the Home button.