I've been running a LAN game from my computer as a server for a few months now without any issues until this big one now. It had been a few days since I, or anyone had been in the nether and I noticed MASSIVE sections of the world missing from floor bedrock all the way to ceiling bedrock when traveling on our nether-ceiling ice-boat highway. Random sections or lines of the over world have also been reset. I opened a back up from earlier this week and noticed the same thing. I was planning on wiping the nether for the new nether update coming soon but didn't think I may have to do it this soon? Would deleting the nether files reset and fix this? We do not have a lot of builds in the nether. I have an exported world file that I can upload to Dropbox or something if anyone would want to take a look. It's ~1.2 GB in size.