Hi, we recommend you to use the Samsung original charger to charge the device, Keep the device updated with the latest software.
Conflicts between running apps may cause the device to heat up.
Restart the device.
Close apps that increase battery consumption or that run in the background when not in use.
Camera issue - we suggest you to please perform clear cache -Open Settings >> Apps >> Camera > Storage >> Clear Cache.
And open Camera >> Settings >> reset settings>>reset.
We inform you also that you have contacted Samsung Canada community support, check with your dedicated country support for further assistance.