note 8 display screen

I am using samsung galaxy note 8 from more than a year. Today I just noticed that one third of screen is like in light red colour, it can be noticed only while opening settings or any app with white background. Is there any user who faced the same issue? But all other functions are working well. May be it's not possible to notice in the attachment. I m just affraid that what will happen with screen in future. I have checked all its functions software, hardware, touch etc.