I don't know why, the house system is completely bugged for me. Not only I can't see windows, or doors, I can place them but they just get "eaten", no door appears and the money is spent. So after resetting my house, it's completely empty, and I can only build cubes that I cannot enter. This happens when I go to friends houses too, for example, they use a staircase that's invisible(I can't use it) to me.
I'm playing in the Black Swan server and my main is YumiEun.