I have been using S9 plus for 2.5 years and till july with heavy gaming and witching youtube video but the recent two updates on phone just added new problems in my phone. The screen gets green tint suddenly and when I call someone the sensor doesn't...
If the problem is in your UI Update that last 2 update then in safe mode it will show the flickering because the error or bug is in the UI whats the use of safe mode
you are right because the last update that happened from july till know might have some error that destroying the pixel or the samsung want us to upgrade that may be the case but if its second then it is time to change the brand