Random blocks appear

Okay, so me and my friend are playing a normal minecraft world together. She sends pictures of things in the sky and ground, they are random blocks, I couldn't see them, but she could touch them and step on them, while I would just walk through them. In the nether, I saw what looked like blocks from an igloo, ladders, a chest, and a white bed. Its getting stranger each time we log on. If we clicked on them they would vanish.