@syaham159 First step would be to clear the storage & cache of the camera app to reset everything, and then optionally clear cache files system-wide as well.
Settings -> Advanced -> Mobile Manager -> Cleanup -> Clean -> Reboot your phone
If this does not work, please check if you encounter the same issue when rebooting in safe mode.
Long press power button -> Long press the restart button until asked if you want to reboot in safe mode
If the issue persists in safe mode, please consider performing a factory reset. Should the issue remain after resetting your device, I recommend you reach out to a local ASUS service center and explain your issue to them.