Are these lines moving, @Krissg1151? Do you have Motion Smoothness on too?
I have the same problem. I have a Samsung note 10+. Also started after the last update. No, the line doesn't move. It's a static black line, about 10cm long.
Is this present in all the apps and screens @P37 ? Would you be able to take a picture using a different device and add it here using the Insert photos (camera icon) above?
Hi, it comes on sporadically when navigating from the lock screen to the home screen.
I have the same problem with my S21Fe 5g.
I bought it a moght ago. when I unlock my phone I get black lines for split seconds.
I just want to know if it's a hardware or a software problem.