At times, when the screens of my devices would flicker with a faint orange glow, particularly noticeable in grayscale mode. This phenomenon would often occur when using night mode or dark theme on certain apps, such as WeChat's input keyboard or the weather app's map feature. However, this issue would mysteriously resolve itself upon switching to daytime mode. Furthermore, even with night mode and dark theme enabled, the issue would not recur. Notably, I have observed this issue on two separate occasions, all of which occurred around 2 am. The reason behind this phenomenon remains unclear.