Are you able to try the following and see if this resolves the issue:
Camera app > Settings > Reset camera settings
If not, I suggest sending an error report within 2-3 minutes of the issue occurring for this to be investigated by our research and development team. Error reports assist with identifying any deviations in your device performance. Once analysed, our team will get back to you with a response to advise further steps. To send an error report: Samsung Members app > Get help > Error reports > select issue category > Describe issue and frequency > Tick ‘Send system log data’ > ‘Send’ in top right.
