Multiple columns of double chests were stacked on top of each other, front half of an entire column of double chests were invisible. When I attempted to break any of the "invisible" chests or open any of them, I was immediately kicked from realms. I attempted to reload the world multiple times and it often brought me back in a few saves back, so I was losing hours worth of progress. Each time I returned to the chest area, they would be missing again and I would be kicked again and lose my save progress.