[Galaxy S8/S8+] Why do there vertical lines appear when shooting images in Panorama mode?

This symptom may occur when there is a difference in the exposure and color
between images when taking panorama shots under simple background states like
a clear sky with no clouds.

Samsung is aware of this symptom and this symptom had already been resolved with
a software update which will be available in the coming weeks. Therefore, please check
for updates to your device software regularly via the Smart Switch PC or FOTA.