Well, I have a close problem of this, my oled pixels don’t turn off when it should be, like, I am watching a movie, the borders is dark like oled but when I touch the screen it turn on, and the hole black scene turn on too, and if im watching a YouTube thing and there is a black scene it shows like oled but if the hole scene is black, otherwise it turn on the black of the movie, and if I put the brightness on 67 or higher it shows like oled, but there is a catch, if I am on clock, settings , or another app that have the black part, it have a delay to the pixel be back as it should, like: open shortcuts, then wait 10 seconds, swipe up to go back to home, but you are on a gray background, or you are on App Library, you will see the shortcuts background, if it is closed, But the pixels
are “opening “ again because of the delay.
search on YouTube about iPhone 12 burn in, this is what is happening on my iPhone when it is on oled mode, but this is happening since I activated the iPhone, I searched a repair here on Brazil on a certificated store, and they sad that it is NORMAL, NORMAL, I’m upset with it ;-;, if you can help me I would be proud.