- Creating a fresh singleplayer world runs fine. - Increasing the LOD distance in small batches seems to not cause the hanging: load into server with 64, then slowly change to 96 -> 128 -> 160 -> 192 -> 225 -> 256 (this was all done by standing still on a single place) - All 256 chunks in radius around are already generated. - Exiting the server and reentering it after keeping the distance at 256 (after doing point 2) hangs again. - The game seems to work fine when loading into the server with a distance of 128.