My s7 edge is a couple of months old but it's quite new, due to careful use and cases, it is not rooted yet, Few week before I notice a very strange problem, I noticed that sometimes the touch stops to respond as good as it should, so I installed touch testing app and also enabled the show touch option in developer tools. Indeed my hypothesis was correct. Although It seems to be totally random and when you turn the screen off by button and turn it back on the problem is gone, this does not happen very often, may be twice or once a day and even less. Now I emailed to samsung and they told me to send the device to their repaircenter but i was wondering if it can be a software problem, its also important to note that the device has updated just last week and the problem is there, its not even a problem but just a nuisance and most importantly I don't want to end up with dead phone. I wonder if it happened to anyone else.