Sometimes when you mine Blocks the textures do not disappear for a pair of seconds.
Sometimes when you place Blocks the textures do not appear for a pair of seconds.
Saw this Bug on several videos.

NOTE:Happens on all devices(I think)

Usually happens when you play the game a while, like 30 minutes.

Example Video:

• Placing: http://youtu.be/A1UoWvx7MdE?t=5m25s
  (The Redstone Mod has nothing todo with, but didnt found a better example yet)
• Breaking: http://youtu.be/Y9AjDjlRdT4?t=11m38s

Example Picture:
-Placing: http://i.imgur.com/WeeFdUM.png
-Breaking: http://imgur.com/OjZTMR8