Issue with my s23u after oneui 6.1

[OmSingh04]

I am using gestures navigation and this white/red(for some apps) line appears at the bottom of apps while going to home screen just bought this phone 

Can anyone confirm if this is normal or there is a software/hardware issue? 

[TimonN]

Try restart.

Else change to button navigation for few minutes.

Restart.

Then change to gestures.

[OmSingh04]

So is it a software or hardware problem?

[TimonN]

Software most probably.

[OmSingh04]

Oh okay restart didnt fix it

[MOQBALI]

• When using gesture navigation on a Samsung phone, a white or red line at the bottom of apps is part of the One UI interface.

• The white line indicates the area to swipe up for going back to the home screen, while the red line serves the same purpose but may appear with certain themes or settings.

• This behavior is normal and does not indicate any software or hardware issues.

[OmSingh04]

No you got me wrong i have highlighted the part where i find the issue
Is this normal as it appers 4 times out of 10

[TimonN]

Its normal , check mine.

[OmSingh04]

Nah i dont mean the navigation bar i know thats normal i am talking about when you swipe up on the navigation bar a red color line appears on the display i attached a picture if i have opened instagram the line is of red color

[TimonN]

Ok, got it.
But I am not getting such line. Tried with different apps.
I don't use instagram but checked with WhatsApp, messages, chrome etc.