I can't see redstone placed on the ground in Mcpe 0.15.0 builds 1,2,3

I have error in the world of mcpe all textures change in Mcpe 0.15.0 builds 1,2,3

I have error with inventory items, not have Picture and don't see swords in Mcpe 0.15.0 builds 1,2,3

I can't see text on signs