I had a minetest server on in terminal and then accidentally started singleplayer at the same time.
Playing singleplayer at the same time seems to have regenerated parts of the map.
I think there should be a system that checks whether a map is in use.
Look what happened:
That used to be a castle :D
It's as if a thousand years has passed.
The lava moat is gone, minerals have spawned in the rock and some of the walls have disappeared!
Has anyone else experienced this before?