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  1. Minecraft: Java Edition
  2. MC-270584

Vault/Ominous Vault loot isn't predetermined, allowing players to create backups of their worlds to get desired rewards

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    • Icon: Bug Bug
    • Resolution: Fixed
    • 24w19a
    • 1.20.4, 1.20.5 Pre-Release 1, 1.20.5 Pre-Release 3, 1.20.5, 1.20.6, 24w20a, 24w21b, 1.21 Pre-Release 1, 1.21 Release Candidate 1, 1.21
    • None
    • Confirmed
    • Loot tables
    • 1226105
    • Expansion B

      This only realistically affects singleplayer. When you open a vault, you get a different set of rewards each time if you've created multiple copies of a world. This means for example, if you see a heavy core in an ominous vault, it's theoretically a guaranteed chance to get it simply by making copies of your world before opening the vault, repeating the process until you eventually get it.

      Steps to reproduce:
      1. Find a trial chamber and locate a vault.
      2. Press F3+C to copy your coordinates.
      3. Exit and make a copy of that world.
      4. Open that vault in one of the copies of the world.
      5. Open that same vault in the other copy of your world.

      Observed results: I got a different set of rewards each time.
      Expected results: I should get the same set of rewards each time.

      Video demonstrating the issue: https://youtu.be/MFutDmMbWj8

        1. MC-270584-No-Repro-1st-Attempt.png
          9 kB
          [Mod] Greymagic27
        2. MC-270584-No-Repro-2nd-Attempt.png.png
          6 kB
          [Mod] Greymagic27
        3. MC-270584-Repro-1st-Attempt-Vault.png
          5 kB
          [Mod] Greymagic27
        4. MC-270584-Repro-2nd-Attempt-Vault.png.png
          3 kB
          [Mod] Greymagic27
        5. MC-270584-Repro-3rd-Attempt-Vault.png.png
          4 kB
          [Mod] Greymagic27
        6. screenshot-1.png
          13 kB
          [Helper] Jiingy

            Unassigned Unassigned
            Thulxyphan CalXee
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              Created:
              Updated:
              Resolved:
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