Running Android 5.1.1 on a ZTE Max Duo (Straight talk phone). No problems with any app but Google app. Starts, loads, crashes immediately. If I delete updates and run factory installed version, runs just fine. Every few days I permit the phone to update Google. It works just fine for an hour, or a day, then crashes again when I run it. Going back to original version (deleting updates) fixes the problem. Any clue why this phone will not run updated Google app for more than a few hours?