iPhone 7+ Overheating quick FIX
I'm an iPhone 7+ player and I think I struck gold. I found a quick fix for the Overheating and the frequent crashes.
Go to Settings > General > Accessibility and get the Zoom function disabled.
I'm running iOS 11.4 and had ZERO crashes or heat-related problems all day.
Haven't found this fix posted anywhere so far and I hope I helped.