Windows phone bug: Screen refreshes within app, displays background momentarily

[go1020]

I was within WPC app reading an article and saw the screen refresh itself. For a moment, an image appeared and disappeared. I think it was the screenshot of the main page of WPC app that was loaded at the time. It was more like a screen flicker, anyone else noticing this? I'm on 8.1.1 DP with Cyan.