Edit: The bug is that the world seed was spontaneously changed either by loading or exiting the server client. Perhaps it was caused during a server crash. Based on two other occurrences I found of the same event, I can conclude that the bug has been present through many versions and happens only when a singleplayer world is hosted as multiplayer using the server.jar executable.
https://www.reddit.com/r/Minecraft/comments/4ypzhb/worlds_seed_randomly_changed/
- - -
Original message:
Treasure maps' unrevealed terrain does not match revealed terrain.
New chunks do not match old chunks-"terrain scar".
Spawn point moved to a new location.
I didn't have this problem initially when playing 1.13.1, 1.13.1 pre-1, or 1.13.1 pre-10. In all three versions I spawned new chunks and used treasure maps without issue, and in one of them I respawned at the world spawn which was still in its normal position.
But today (in version 1.13.1 pre-1), all new chunks do not match old chunks, all treasure maps do not match the terrain, and when I respawned at world spawn, it was in a new place. My version has not changed recently. I am using the server.jar of 1.13.1 pre-1 but I had spawned new chunks before in this very server version and did not experience terrain generation issues or a terrain scar.
In the image, you see the player in chunks originally spawned a few days ago in version 1.13.1 pre-10 server (IIRC), and ahead you can see new chunks spawned today in version 1.13.1 pre-1 server. After encountering this bug, I changed to 1.13.1 server to see if it was still happening, and it was indeed. New chunks generated match the terrain in the distance in the image, and do not match the foreground terrain.
This world was initially created in one of the 1.9 snapshots months prior to its release.
Attachments
Comments 5
I'm not sure. I used the file server.jar to run Minecraft as a server, and connected to it via the multiplayer interface. The world was played in singleplayer in 1.13 versions and later migrated to the server.
I have found more examples of this bug occurring, different versions of the game but always with a server hosted by their computer.
https://www.reddit.com/r/Minecraft/comments/4ypzhb/worlds_seed_randomly_changed/
I have discovered that my world's seed has been changed from -8264751760597529176 to -7963587952799384041. That would explain the issues, but I can't find any reason the seed would have changed. I have done nothing to provoke it. I have never attempted to change my seed. All I have done is change versions several times and migrate my game to a server. And the seed changed at some point when I hadn't changed the version.