The Texture Tornado
I found this bug when I reinstalled CC on my phone, but this also fixed after I logged off and on the next time. I was confused originally thinking "Jeez! Is this some new block or something?" because I hadn't played in a year and thought some crazy update came out.
What I found out was that the textures replaced the fire effects on items like the candle.
I'm not sure if this is a bug with my device or with the actual game, but I still feel I should mention it.
EDIT: I call it the Texture Tornado because it was all spinning rapidly, like a tornado.