I got the 9 update and now it's nothing but problems. I have to restart at least once a day because my navigation bar is missing the recent button. Then the settings change all the time. The screen zooms then and I am not able to figure out where half the stuff I use to use went like split screen or taking a screen while I am on it and making it a pop. I have tried getting customer chat and after I send a few text I dont get a reply and have to close out and start again.
Have you tried customizing your navigation buttons? Under Settings>Display?