VishwanathS_ghante I know your problem
It’s a common problem with OLED Displays and this is called PIXEL BURNING.
Due to excessive use of a perticular PIXEL(s) on OLED Displays , the Pixel are in the sense get (Burned) and when ever screen turns on the pixels are Like that Burned
This is a common problem among the phones of all brands with OLED Display and even with APPLE and SAMSUNG…..
And sometimes in rare cases this problem also occurs with LCD Displays……
The Solution is to CHANGE THE DISPLAY or DEAL WITH IT……
Or if it is Actually a SOFTWARE ISSUE then Brand can fix it in a SOFTWARE UPDATE if the public demand is high for this problem…
I think this help you……