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  1. Minecraft: Java Edition
  2. MC-184740

Structures generated in previous versions are not recognised as valid structures, causing mobs not to spawn

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    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Fixed
    • Affects Version/s: 20w21a
    • Fix Version/s: 20w22a
    • Confirmation Status:
      Community Consensus
    • Category:
      Datafixer, Mob spawning, Structures
    • Mojang Priority:
      Very Important

      Description

      Structures generated prior to 20w21a (e.g. 1.15.2, 20w20b, etc.) are not considered valid structures within this version.

      As such, mob spawns specific to certain structures (e.g. Guardians for Water Temples, Wither Skeletons for Nether Fortresses, etc.) no longer occur if the structure was generated from a previous version.

      This is likely caused by the changing of structure names to full lowercase.

        Attachments

        1. 2020-05-20_19.32.13.png
          2020-05-20_19.32.13.png
          1.61 MB
        2. 2020-05-20_23.09.07.png
          2020-05-20_23.09.07.png
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        3. 2020-05-21_15.49.19.png
          2020-05-21_15.49.19.png
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        4. 2020-05-22 114128.png
          2020-05-22 114128.png
          1.14 MB
        5. fixed_nbt.png
          fixed_nbt.png
          29 kB
        6. Ilmango's Witch Farm, Not Spawning Witches.jpg
          Ilmango's Witch Farm, Not Spawning Witches.jpg
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        7. image-2020-05-25-00-23-49-707.png
          image-2020-05-25-00-23-49-707.png
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        8. image-2020-05-25-00-32-56-468.png
          image-2020-05-25-00-32-56-468.png
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        9. image-2020-05-25-00-33-40-396.png
          image-2020-05-25-00-33-40-396.png
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        10. image-2020-07-18-13-55-02-356.png
          image-2020-07-18-13-55-02-356.png
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        11. Inked2020-05-21_13.27.23_LI.jpg
          Inked2020-05-21_13.27.23_LI.jpg
          1.38 MB
        12. Screenshot_158.png
          Screenshot_158.png
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              Assignee:
              Unassigned Unassigned
              Reporter:
              Cyberparty J C
              Votes:
              113 Vote for this issue
              Watchers:
              74 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:
                CHK: