I noticed that many people are experiencing a similar problem with Galaxy 5S. Just got a replacement phone and with the new phone new problem appeared -- each time I pressed the home button, it automatically took me to Google. It was annoying, I had to use "back" button several times to get to home screen. After hours of searching online, and on my phone, I found the solution: In your Personalization menu --> go to Accessibility --> in Categories find Dexterity and interaciton --> under Interaction control make sure it is checked off as "on". I tried everything else and this finally worked. Now, now more going to Google when pressing Home button, it actually takes me to the home screen now. Hope this helps.