MacBook Pro: Glitch/Copy of closed Window - Graphic card or monitor defect

I have issues with my Mid 2012 MacBook Pro Retina 15.4" (16GB RAM, i7 2.6Ghz, 500GB Flash Drive, Dual Graphic: Intel + Nvidia GT 650M)

Whenever I open and close any of the application, it still stays on desktop for a few minutes - but with very low opacity (5% maybe - visible on pictures below). Is it some kind of glitch which is solvable or it maybe graphic card or screen is damaged?

I tried another macOS install, tried another Hard Disk, tried SMC Reset, Tried VRAM Reset. This is happening in macOS Sierra and macOS Catalina. After reboot it still stays over there for few minutes. I guess it is a screen/monitor defect?

What may be causing this? Is it possible to resolve it? And if yes, how?

The MacBook screen is experiencing what's called a burn in effect image persistence. This problem is an electric charge build up on the LCD. (Correction by @Allan)

It's a hardware issue and is generally resolved by screen replacement. There is no software fix for this issue.

_{(P.S.: Apparently, this issue was widely faced by a lot of Mid 2012 Retina MacBook Pro users. Related discussions here and here)}