I loaded a world I already had as experimental after the most recent update to MineCraft and it basically took all of my builds in the world and pushed them below the bottom of the world which deleted most of them entirely. Basically, all of my builds are gone and there is a gapping hole in this flat world that I spent 100's of hours on. I have pretty much given up on this world but I will not be loading in any of my other experimental worlds. I have been using the experimental feature for years and never had this issue. Please fix this quickly before other people lose their stuff.