disappearing Redstone torch, game crashes when I leave world, change skin, then log back in the world.

I made a locking door in mcpe 0.13.1 and rebuilt it in mcpe 0.14.0 build 2, it worked in 0.13.1 but now the Redstone torch keeps disappearing when I restart mcpe or leave world, its annoying the heck out of me!!! also game crashes when I leave world, change skin, then log back in the world.