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  1. Minecraft: Java Edition
  2. MC-110386

Certain mobs attack themselves when targeted by a mob of the same type

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • None
    • Minecraft 1.11, Minecraft 1.12.2, Minecraft 18w03b, 1.16.1, 20w29a, 20w30a, 1.16.2 Pre-release 1, 1.16.2 Pre-release 2, 1.16.2 Pre-release 3, 1.16.2 Release Candidate 1, 1.16.2 Release Candidate 2, 1.16.2, 1.16.3 Release Candidate 1, 1.16.3, 1.16.4 Pre-release 1, 1.16.4 Pre-release 2, 1.16.4, 20w45a, 20w46a, 20w48a, 20w49a, 20w51a, 21w03a, 1.16.5, 21w05a, 21w05b, 21w06a, 21w08b, 21w14a, 21w15a, 21w16a, 21w17a, 21w18a, 21w19a, 21w20a, 1.17 Pre-release 1, 1.17 Pre-release 3, 1.17 Pre-release 4, 1.17 Release Candidate 1, 1.17, 1.17.1 Pre-release 1, 1.17.1, 21w37a, 21w38a, 21w39a, 21w40a, 21w41a, 21w42a, 21w43a, 1.18 Pre-release 7, 1.18.1, 1.18.2, 22w11a, 22w17a, 1.19 Pre-release 1, 1.19, 22w24a, 1.19.1 Pre-release 4, 1.19.1, 1.19.2, 1.19.3, 23w03a, 23w04a, 23w05a, 23w06a, 23w07a, 1.19.4 Pre-release 1, 1.19.4 Pre-release 3, 1.19.4, 23w13a, 23w14a, 1.20 Pre-release 1, 1.20 Pre-release 2, 1.20 Pre-release 4, 1.20.1, 23w31a, 23w32a, 23w33a, 23w35a, 1.20.2 Pre-release 1, 1.20.2 Pre-release 2, 1.20.2, 23w40a, 23w41a, 23w42a, 23w44a, 1.20.4, 24w03b, 24w04a, 24w05a, 24w07a, 24w11a, 24w12a
    • None
    • Confirmed
    • Mob behaviour
    • Low
    • Gameplay

      The bug

      If a zombie is provoked by a second zombie using commands, the second zombie will join in the fight against itself, causing it to attack itself repeatedly.

      Originally reported by malon. See also this discussion on Reddit.

      Affected mobs

      Bees, blazes, endermites, husks, pandas, ravagers, silverfish, witches, wolves, zombies, zombie villagers, zombified piglins.

      How to reproduce

      1. Summon two zombies that cannot move:
        /summon zombie ~-2 ~ ~ {UUID:[I;0,0,0,1],Attributes:[{Name:generic.movement_speed,Base:0}]}
        /summon zombie ~2 ~ ~ {UUID:[I;0,0,0,2],Attributes:[{Name:generic.movement_speed,Base:0}]}
      2. Summon a snowball, belonging to the first zombie, above the second zombie:
        /execute at @e[nbt={UUID:[I;0,0,0,2]}] run summon snowball ~ ~3 ~ {Motion:[0.0,-0.5],Owner:[I;0,0,0,1]}

        The first zombie begins to attack itself

      Code analysis

      Code analysis can be found in this comment.

        1. MC-110386.mp4
          1.54 MB
          [Mod] j_p_smith

            Unassigned Unassigned
            Darth Cobby [Mod] j_p_smith
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            23 Vote for this issue
            Watchers:
            9 Start watching this issue

              Created:
              Updated:
              CHK: