Touches on screen and the buttons near home button get unresponsive?

[AC Question]

So it's been like 2 weeks since I got my Galaxy S7 Edge. The phone is pretty good but there is something that worries me a lot. After sometime (Maybe like an hour straight) playing Pokemon GO (probably on other games too) screen touches and the buttons near the home button get unresponsive. I know that restarting the phone will fix the problem for a time. I try to hold the power button, the options to turn down and restart appear. Then I try to click on restart button but it seems like I click completely different button instead (Back button in my case). Another case is I'm on my home screen and try to click Messages app but instead it open Camera app which is not even close to what I'm clicking. Please Help !!! Thanks !