No, it's specifically just certain app windows. If it was a hardware failure, we would expect the whole physical display to flicker.
No, it's specifically just certain app windows. If it was a hardware failure, we would expect the whole physical display to flicker.
A remote possibility: macOS can switch between different graphic modes, depending on the application, utilizing different hardware and power profiles. At least, it does so on my laptop, and old one with two different graphics "cards", but I don't know if that's your case.