I have been working with MS engineers over the past year. Sporadically, but ongoing
The issue isn't WHAT windows is displaying it is HOW it is displaying it. Usually in Windows 10 and later these changes are DirectX related.
So if a DirectDraw/DirectWrite/DirectDiplsy update comes out, you can look at the same picture, same color, same everything, and have symptom where you never had any before. Because it s drawing the same thing, in a different way.
To date we have not been able to find out what changes trigger our symptoms. We have narrowed things down to specific Updates that can make a Good display a Bad display, but there are zillions of changes in every update.
Have you tried patching?