After updating from 1.13.2 the nether map has completely reset itself and there is no sign that I have been there previously (torches, tunnels, structures).
Comments 5
Please attach the zipped world file here, preferably a backup from before you updated to 1.14. If the file size is too large, please upload it somewhere else, and then link to it here.
Is this still an issue in the most recent versions (currently that is 1.15, or the latest pre-release 1.15.1-pre1) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.
Was the world on a Spigot or Bukkit server previously?