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  1. Minecraft: Java Edition
  2. MC-73881

Summoning monsters in peaceful difficulty spawns monster for 1 tick

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • None
    • Minecraft 1.8.1-pre3, Minecraft 16w05a, Minecraft 16w40a, Minecraft 1.11.2, Minecraft 1.13.1, Minecraft 1.13.2, Minecraft 19w12b, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, 1.15.2, 20w07a, 20w08a, 20w09a, 20w10a, 20w11a, 20w12a, 20w13a, 20w21a, 1.16 Pre-release 2, 1.16 Pre-release 3, 1.16 Pre-release 5, 20w28a, 20w29a, 20w30a, 1.16.2 Pre-release 1, 1.16.2, 1.16.3, 20w46a, 20w51a, 21w03a, 1.16.5, 21w05b, 21w06a, 21w07a, 21w08b, 21w15a, 21w17a, 21w20a, 1.17 Pre-release 1, 1.17.1, 1.18.1, 1.18.2, 1.19, 1.19.1, 1.19.2, 1.20.3 Release Candidate 1, 1.20.4
    • Confirmed
    • Mob spawning
    • Low
    • Platform

      The bug

      When you summon a monster, it does not only flash, but also really exists for one tick. This may cause unnecessary CPU usage because the pathfinding algorithm maybe already starts.

      How to reproduce

      1. Set difficulty to peaceful
      2. Place a command block with this command: /summon zombie ~ ~1 ~
      3. Place a chain command block after it with this command: /execute if entity @e[type=minecraft:zombie,distance=..4] run say ZOMBIE DETECTED
      4. Activate the first command block
        → Observe how the command block said "ZOMBIE DETECTED"

        1. 2018-09-12_21.52.33.png
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        2. 20220427_161447.mp4
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          FlyingCharcoal

            Unassigned Unassigned
            Awesoman3000 Connor Steppie
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              Created:
              Updated:
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