The charger socket is very hot should be caused by poor contact between the front and the socket, due to the existence of contact resistance, so when passing a large current, it will heat up, heat up for a long time, and the heat dissipation conditions are not good, which will lead to plastic melting and produce a burnt taste.
You can check the plug and socket to see if there is obvious oxidation, if you can not determine where the contact is not good, it is recommended to change a new set of plug and socket to avoid danger.