Does anyone find in your S23 ultra device has green blinking small dot light at left bottom of the screen (near the finger print sensor). I noticed when I bought the device & soon later an update fixed the issue once for all. But again I'm noticing it after the latest update.
This might be the proximity sensor. Your best call is to first backup to smart switch, reset the phone (factory), and restore your data using your PC's smart switch.
Probably an dead pixel in screen which sometimes recover by itself and sometimes it can spread more and get bigger if pressure applied in that area if it's under warranty then take it to Samsung service center
And it's not an proximity sensor because it's located on top near front camera
