T480 Screen darkening on dark applications

Hi, I’ve been having a weird issue with my T480’s screen brightness. Whenever I have an application where the screen is mostly displaying darker colors or blacks, the actual brightness of the display dims down a lot. I have tried a few things to remedy this, disabling the intel igpu power saving stuff, setting adaptive display brightness off, etc.

Has anyone else had this issue, and is there a way to resolve it?

I had that on a Dell machine and there (yes, I know, completely different machine) it was impossible to turn it off. “Working as intended” basically.