So for the past few months at least that I have noticed apps such as Snapchat, Tinder, mostly anything really warm my phone up a bit, not really noticeable in my hand but when pressed against my face or top of my hand I notice it. Can only really notice it though if case is off? Does this happen to anyone else??? Happened on iOS 11 and 12, tried a restore, had gotten a new X and same thing. Am I just being paranoid or is this normal?