Gray cloud/hue on bottom left side in PG279Q

[xhikmatx]

I'm facing an issue with my pg279q, I had this monitor for 2.5 years now with zero problems and with very minimal light bleeding. However, a couple of week back I noticed this gray sort of gray shadow/hue on the bottom left corner that goes up all the way to the middle of the screen, then it sort of fades away [it's impossible to capture it by a phone cam accurately]. I only found one similar user that have this issue but in a much more excessive fashion here https://rog.asus.com/forum/showthrea...cklight-issues

It is very hard to notice in normal usage/gaming, but can be slightly seen when I'm browsing website with solid colors as border etc...Here is a a picture sort of representing the situation but in reality it's less. https://imgur.com/a/Ar1EPjA

Can someone please explain to me if this is an acceptable quality defect or whatever it is I'm having?

P.S: This is an RMAd monitor since my first one was a BLB nightmare, and the monitor is used in a closed temp controlled enviroment

[xhikmatx]

Anyone?

[KuraiShidosha]

Looks like yogore/mura. Did you keep this at max brightness the whole time?