IPS glow is ALWAYS symmetrical when viewed head on.
Any asymmetry is either backlight bleed or pressure spots (foam and box can be like finger pushing on screen on steroids for days on end, those take a while to fade).
Pressure spots takes about 1 week to disappear. Run monitor 24/7 at maximum brightness to get shipping-derived pressure spots to fade faster.
Three different black-affecting artifacts can be occuring simultaneously
- IPS glow (always symmetrical when viewed head on)
- Backlight bleed (light leakage at edge)
- Pressure spots (like pressing a finger on a screen, but it can be caused by mis-shipped box).