Samsung, i believe you should do a recall on your phones. Its obvious that this vertical green line is a known issue on your s20 plus line.. I just had a software update early in the morning and tonight out of the blue this vertical green line suddenly appeared on my screen. This isnt satisfying samsung.
I have the same problem as well, once I update my software with samsung Brought up this issue up with their servicing center in Singapore, Plaza Sin bench, they refuse to acknowledge there was an issue.
My colleague also jave this **bleep**y issue after update his software.