Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
1. Check space availability: Settings > Device Care > Storage
Request you to keep at least ''minimum 20% internal memory free''
2. Check space availability: Settings > Device care > Memory
To improve the performance RAM of the device should be free. So, clear the RAM memory once in a day.
For heating issue please visit this mentioned link: https://www.samsung.com/in/support/mobile-devices/why-the-device-heats-up-during-use/
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support