What is this shadow on my monitor? It suddenly appeared today. At first, I tried to just turn my monitor off/on, and sometimes it's fixed, but now it won't go away no matter how many times I turn it on and off, even the PC itself. I thought it's a display port/HDMI problem, but even if both cables are unplugged, it's still there.
Edit: this is a one year old monitor, bought it in February 2025. I was careful with this monitor as much as I could. and the shadow just appeared today.