iPhone X Screen flashing or blinking

I’m not a beta tester but, I’ve never experienced that

 

iPhone X as well currently on 11.3.1. I have the same issue. It happened when I tried to use my camera and has happened when just trying to see a youtube video. Reboot fixes the problem but this is annoying especially when trying to use that camera and time is of the importance. On a side note, if you are taking a video it still records while the screen is flashing on and off.

 

I've not seen the entire screen blinking on and off but do periodically get the icons flickering for about a minute after plugging in for a charge. It settles down after a short while and is then quite stable again. I've had this happen since day one of getting the X and has continued with all of the iOS updates since. It doesn't seem to affect the operation on the phone at all though, everything still seems to work as it should.
I can't recall it doing this on previous iPhones from 5 onward.