A lot, if not the majority of smartphones these days use OLED screens, which are subject to a phenomena called burn-in. In short, if an image is displayed for a long time at the same position, the pixels at that position degrade over time and the image is slowly being burned in, permanently leaving a shallow but certainly noticeable version of the image behind.
Since Privacy Dashboard also displays the permission bubbles while the screen is "off", or at least, locked and displaying an AoD, it will eventually cause this.
I understand that this might be a low priority request as it usually takes some time for OLEDs to actually show signs of burn-in, but there's a reason why all (good) Always-on-Displays shift the image they're displaying a few pixels from time to time.
A lot, if not the majority of smartphones these days use OLED screens, which are subject to a phenomena called burn-in. In short, if an image is displayed for a long time at the same position, the pixels at that position degrade over time and the image is slowly being burned in, permanently leaving a shallow but certainly noticeable version of the image behind.
Since Privacy Dashboard also displays the permission bubbles while the screen is "off", or at least, locked and displaying an AoD, it will eventually cause this.
I understand that this might be a low priority request as it usually takes some time for OLEDs to actually show signs of burn-in, but there's a reason why all (good) Always-on-Displays shift the image they're displaying a few pixels from time to time.