RAIDEN™which charger you are using and also make sure slow charging is disabled cause with slow charging enabled , mobile will only take 10 watts from charger and if game needs 12 watts than mobile will use remaining 2 watts from battery
Will dm you soon.
Here I noticed three issues -
1.) Device temperature rise upto 47/48°c if bypass is used.
2.) Sudden fps drop.
3.) Battery gets 1-2% charged after playing like 40minutes or more.