I have an 8 and no overheating issues here. Is it new or did you update the software recently? Sometimes indexing can cause that. What apps are you using etc? More info might help us help you.
Can you screen shot the battery info and upload it here so we can see what apps are using most of the battery, resulting it to over heat. Settings>Scroll Down>Battery
There are no heating problem with my ip 8 anymore. It just because of some apps i was uninstall few apps, and then it’s gone!!
Thanks all of you to help me!