Black lines after unlocking

[Krissg1151]

I have a Samsung S20 FE 4g

I have noticed since the newest android 12 updates when the unlock s reen is transitioning to the home screen I have black verticle lines that will appear for a split second, it only happens during this transition though, this never happened with the older OS.

Does anyone have any ideas how I can remedy this?

Thanks in advance.

[CarlH]

Are these lines moving, @Krissg1151? Do you have Motion Smoothness on too? 

[P37]

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. 

[TessM]

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? 

[P37]

Hi, it comes on sporadically when navigating from the lock screen to the home screen.  

[Haydar Dhafer]

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.