My wife has an unrooted Verizon Note 3. Since the KK upgrade, she's had problems with the keyboard and rotation. For the keyboard, sometimes when she tries to reply to a message, the keyboard won't type. She has to exit out of the app, long-press home to clear all open apps, and open the messaging app back up, sometimes several times. For the rotation, she'll sometimes be holding it completely portrait, but it will rotate landscape. Has anyone had any similar issues since the KK upgrade?