Dear Samsung Member,
Greetings from Samsung Customer Support!
We at Samsung understand your concern. Kindly follow the below mentioned steps to improve the performance of the device:
1. Too many apps installed on device may cause the device heating issue. Uninstall the unnecessary apps if not using them.
2. Usage of mobile phone when charging may cause the heating issue. So we recommend you to avoid usage of mobile phone while charging.
3. Long duration of graphics intensive gaming sessions may cause the heating issue.
We would request you to please click on the mentioned link to resolve the issue related to device heating:https://www.samsung.com/in/support/mobile-devices/why-the-heating-issue-occurs-in-mobile-device/
If the issue still persists, register your concern in Samsung Members Application in order to assist you better. (Samsung Members App > Feedback >Error report > Attach log file for any issue)
Thank you for writing to Samsung.
Samsung Customer Support