Hello,
HW: Pimax Crystal Super UW / RTX 5090 / 9800x3D. Almost all settings on High/Ultra/ON.
I see this artifact when looking at sun, or lightblue sky, it is like mask/filter darker rectangle - where I look using Dynamic Foveated Rendering it goes ( like where my eyes looks at the moment and DFR/QV is focused ).
It is not fixed for many months, I seen this - maybe DEV can check if some mask left for debug, or something.