I don't even know what is happening right now. So yesterday i was finishing up placing some heads in the headshop, as you do, i logged off i would say 20mins afterwards due to the server being extremely laggy. So this morning i went online to see that these heads had gone and some of the glass was gone and two random heads were missing too. So i just put it down to lag, got the heads back and placed them again. No further trouble their. Then i was building on my other plot, a big building, i did lots of stuff. A) i noticed that when i was placing the glass roof parts of it were blackened and when it started raining the rain that fell in this area was also black. B) when i just went back on i saw that lots of the work i did on the plot had gone, like the blocks had reset?! I was like what because it wasn't like it was in a chronological order. It was random parts of the work i did throughout the day?! I am playing in 1.11 i don't know if that has anything to do with it. I was also playing with my sister and she could see the things i was building so it wasn't computer lag. Please help me, i'm scared to build anything now just in case this happens again 
