Sometimes when I am in a thread, I have noticed that the screen goes completely dark when I scroll down far enough in a thread. It will go dark for a few seconds and then pop back on where I was in the thread. Then I try to scroll to the next comment, it goes dark again for a few seconds. Rinse and repeat until I'm so frustrated, I don't bother finishing the thread. There's a greater than zero chance that it's on my end because my phone is a piece of shit. Any ideas why it's doing this?