Hello, Did you clear the camera app data? If not, Goto Settings > Apps > Camera > Storage > Clear Cache > Clear Data. Also try after turning off Bixby routines (from quick button panel). Also please check your software (Settings > Software update > Download and install.) and all apps from both stores are up to date.
If nothing works, check wheather the issue persists in "safe-mode" also. If it is solved in safe mode, it means that, the issue is caused by a third party app you have recently downloaded. (To activate safe mode, press and hold the power off button. ( 🔴 Red button on the screen).To exit the safe mode, just restart the device).
Hi there, as you already have tried everything including a factory reset, the issue might me because of a hardware failure. Please visit the nearest Samsung service center to get the issue resolved.
