Mojang Team found some nasty bugs in the last update and have put out a patch. Please make sure you update your mobile Minecraft. They are really sorry for the issues

0.6.1 is a bug fix update for 0.6.0

  • Crash bugs: multiplayer chests and Sign input
  • Newly put on armor items would overwrite old if it wasn’t removed first
  • Half slabs could get stuck in “upper” position
  • Xperia Play controls
  • Disconnecting issues on iOS
  • Saving worlds are fixed
  • Updated screenshots on AppStore

Credits: The Minecraft Pocket Edition Team