Report your issue here:
What? Please explain briefly.
Idk what are you complaining about. For me, live wallpaper are shown with all other system wallpapers. (Using OP6)
Play on smooth graphichs and keep the framerate on high. Heating would be much lesser.
As there is no screenshot and you told the icon is beside signal icon, therefore it's a system icon.
So, go to settings> display > status bar > icon...
Make sure these are not messed up.
Check on play store.
Post a review on playstore or report here https://forums.oneplus.com/feedback/
If you want to remove it,
Open settings> display> status bar> icon manager> turn auto rotate screen off.
BTW it's off by default.
How is your sim's signal strength in your area? Heat may be caused due to poor connection.
Did this happened multiple times?
Try contacting another customer support store and see what they have to say.
So it means that every time we charge our phones,
hamaare phone ke L lag jaate hai?
Use sd maid maybe? System analyser feature is great to recognise oversized junk.