Why is my Phone Screen Dimming Intermittently?

Episode 1588 (1:01:10)

Jason from Indianapolis, IN
Note8

Jason called last week about his phone's screen freaking out. Leo thought it was the proximity sensor causing the problem. Jason did a factory reset and that solved the problem. Leo says that may have indicated a failed update. The first thing he should do when something weird happens out of nowhere is to do a factory reset.