In my plot, I have noticed that I do not have any bedrock under it. Even when I reset the plot it does not have any bedrock. Someone else's plot is also bugged this way. Their plot is next to mine. That is the only way I know. I have not looked through the other reports, so I do not know if anyone else has experienced this bug. It only happened in one of my plots in creative world 3. The plot cords are: X:-3273 Z: 2239