Hi, I have the exact same issue. I recently got a Galaxy s6 that was factory reset and updated to 7.0 and it worked perfectly. Last night these two problems began. I note that I had received 4 app updates that night; Google, Maps and two other apps which I have now removed. Now I have these two problems and also that sometimes Google comes up when short pressing the Home Button, which it is not supposed to do. I know for a fact that the power button hardware is not broken since I can make a hard reboot (volume down+power). Sometimes after I have rebooted the phone it works for allright for a short while. Did you find a solution to this problem?