This rly happened in 1.7.10 but the affected versions didn't have 1.7.10 as an available version but hear me out! Hmm, idk if this counts as a bug as in singleplayer minecraft or the launcher itself but me and my friend encountered something weird. So we used mcedit to add in a schematic file, it was bigger than we expected and when we placed it, air replaced some of our build so we had to rebuild everything. Afterwards, I went to eat and closed my laptop lid while still on the server (ik this is bad) I open it later on and was disconnected. I relog back on and everything got reverted and undoed. My rebuild and new builds where undoed. It reverted bk to exactly ater we placed the schematic and the parts of the shops and builds where replaced with air. Could someone tell me how this works when non of us did anything and my friend kept the server running? Even me leaving myself on closing laptop lid shouldn't affect anything.