User blog comment:The Woolly Howl/Theme Update/@comment-27901943-20180520105813/@comment-31135394-20180520155741

I noticed that too actually, except it's only half the screen for me. It caused a bit of anxiety at first because it appeared maybe I clicked something I didn't mean to, and then my brain wonders "What did I just do?", "Why did it do that?", "What's it going to do next?" I don't actually have to click a link either, I can touch anywhere on the screen and half of the screen will flash blue for a second.

BTW, I had to take like 10 screen shots before I captured it, it happens so fast and my fingers aren't, haha.