Recently, my s pen has not been working correctly on all parts of the main display of my z fold 4. It's almost like there are dead spots on my screen. I can't write on these parts. However when I touch those areas to swipe with my finger/move the screen it's fine. It won't work with the pen though. Not sure if this started after one UI 5. I wasn't using my fold as much in recent weeks as my SIM card was in another phone but now it's back and I'm disappointed to be running into this issue. Not sure if it's happening to anyone else.