Don't quote me on this, I might be wrong, haven't checked the facts. This is purely how I've understood it in general:
I don't think changing the panel type will do anything for the backlight issue. Pretty much 90% of the modern monitors use Edge-lit LEDs for backlight. The cause of the bleed is more probably an assembly error, and thus manufacturer-specific. By this I mean the phase where the different parts (backlight unit, electronics, panel, chassis) are put together, and there is something that passes through the initial inspection, but with more thorough scrutiny from customers, the problem arises.
For example, it might be that within a certain time period they were experimenting with a cheaper adhesive, and that experiment then backfired, as the adhesive failed after a certain time (or possibly via vibration during the transportation). Or if it's tightened with screws, there might have been a malfunction in the assembly line (like a jam in the screw feeder, too low/high torque resistance setting in the tightener, etc.), and they noticed it too late. Then again, it might also be an issue/anomaly with the light diffuser. Not sure if that is part of the backlight unit or the panel, but I'd reckon it's part of the backlight unit. Which would affect all manufacturers/assemblers using the same component supplier.
If someone more adventurous is stuck with a faulty unit and desperate to find the cause, they could try opening the unit and tinker around. And like said above, some people might be confusing IPS glow for backlight bleed. I'd recommend everyone experiencing backlight bleed issues makes sure they know the difference.