I just entered a world in wich it was snowing when I left the day before. As soon as I joined I could only see the falling snow, but nothing else (like the landscape or the gui). When I tapped on the screen to move around I saw everything, but after moving my finger away from the screen again, everything was gone again. I also reloaded the game, but it didn't change anything. The screen shot shows it.

PS: My device is an Samsung Galaxy S4