Minecraft PE force close when you place detector rail in the game.

I got beta version of minecraft pe, when I try to use detector rail block the whole minecraft gets force close. I am using Samsung Galaxy J1 (SM-J100ML) running on android 4.4.4 or Kitkat version. If you have any questions about my issue please let me know. I will provide screenshot if you want. The only problem is force close when placing detector rail.