It has a duplicated save slot identifier which can confuse what save data to load (related to mods losing data). If you load into Manage Worlds (World View) directly from the Main Menu and 'Save As' to a new slot, that save slot is partially bugged. It's best you ALWAYS 'Save As' during gameplay or building. It has an incorrect null save slot identifier that will prevent loading some save data correctly (related to mods losing data). If you load into gameplay (Live Mode or Build Mode), then exit to Manage Worlds, and 'Save As' to a new slot on the Manage Worlds screen, that save slot is bugged. There are two cases that can cause your game save to get buggy and lose some save data.