Yeah, I'm thinking this is terrible backlight bleed, but these kind of things are hard to decide 100% through photos compared to seeing it in person with your own eyes.
A way to distinguish how much of it is just normal "IPS glow" and what's backlight-bleed is this: move your head (or your camera) around and position it so you are hovering at a right angle to the surface over the edge or corner you want to judge. When you are looking at the surface in front of you at a right angle, is a black color in that spot now dark or not? If it's dark, the shine you were seeing was IPS glow. If it's still bright, it is backlight bleed.