After the update to Android 6.0 lollipop I can't wake up my screen most of the time. A few times it will work by tapping the screen or pushing the power button. And sometimes it takes several attempts. But most of the time I can't wake it up unless I plug in a charger or headphones. This is getting really annoying and if I had an emergency I can't count on being able to use my phone. Please tell me there is a fix.