I have had this issue twice recently. It seems to happen when it is sitting on the wireless charger and I am still using it.
Is this something to be concerned about and should I take it in to the shop to have it looked at?
Dear Samsung Member,
Greetings from Samsung Customer Support!
Please visit this mentioned link to resolve your device heating issue: 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.
Warm Regards,Samsung Customer Support