Abdul-Muhaymin Hey bro, I’m not really sure about it. But all I know is people over here play intense games on their mobile phones, especially pubg a lot.
Handle with care is important!
A phone should not be charged immediately after a long session of intense tasks or gaming. I even see some people play these games plugged in. Such things damages the hardware components in a long run.
But if the issue is with the phone itself after making sure of these parameters then obviously it has be diagnosed by nothing.