[1.12.2] Need advice to find the right event (Client Disconnection) [SOLVED] in Modder Support Posted July 7, 2018 8 minutes ago, Draco18s said: Or save the data to the world. .. I do save data to the world and i change registry values on world startup if data differs from default state. I just undo this changes every time client disconnects. It is probably unnecessary, but I feel comfortable to know that when no world is loaded - the registries have default values.