Texture Bug!

Another bug I found is that if I leave the game on pause and I'm going to check other app's and then I go back to the game, the animated textures like fire, lava, water and the nether portal stop moving and they get mixed up (at least with the lava happens like that), I hope they fix it because it looks ugly and forces me to restart the game.
PS: I will only put pictures of the water and the lava since that is where you will get to notice the most.