Kindly complaint to Samsung customer support through Samsung Members App as error report also send log files Along with this error report for this issue. Then go to service center for replace /repair it's. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.
As per your query, If you are facing a line issue on your device, we would request you kindly visit the service center and inspect your device with the technical team end, they will provide you with all the information in a better way after inspecting the device physically.
