u/Mysterious-Dark9595

I never wear Casio watches or full rubber watches.
I have 6 watches but excluding those this one most comfortable.

So my iPhone 14 pro is running IOS 26.5.
I used my phone for basic things but yesterday I did something change on reduce white point, increase contrast, smart invert and dim flashing light.
Well, I was changing those because my BH is 77 so for increase the screen on time I was trying those settings after that I toggled off all settings and bring my phone back to how it was before. And today morning I see the pink line on left side of my phone screen. It was disappear for 4 or 5 minutes then it came back.
I am looking for next update, hopefully it will fix.
I assume it can be fixed without changing display, but why did it happen?