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  1. Minecraft: Java Edition
  2. MC-156022

Mobs' pathfinding breaks when on waterlogged top slabs

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • None
    • Minecraft 1.14.4 Pre-Release 2, 1.14.4, 19w34a, 19w38b, 19w42a, 1.15.1, 1.15.2, 20w12a, 20w13b, 20w16a, 1.16.4, 1.16.5, 1.17 Pre-release 1, 1.17, 1.17.1, 1.18 Pre-release 5, 1.18.1, 1.18.2, 1.19.2, 1.19.3, 23w05a, 23w32a, 1.21.3, 24w46a
    • None
    • Confirmed
    • Mob behaviour
    • Normal
    • Platform

      The bug

      Entities have difficultly pathfinding when standing on waterlogged top slabs.

      Similarly to MC-136318, the mobs will stop moving and spin when on top of a waterlogged block. In 1.14.4 Pre-Release 2, the pathfinding was fixed for most waterlogged blocks. However, the pathfinding is still bugged if the block is the top half of a waterlogged slab.

      How to reproduce

      1. Run the following command: 
        /fill ~10 ~-1 ~10 ~-10 ~-1 ~-10 minecraft:cut_copper_slab[waterlogged=true,type=top]
      2. Summon a cow on top of the cut copper slabs
      3. Attack the cow

      Observed behavior

      The cow does not panic; it has difficulty pathfinding while on waterlogged top slabs.

      Expected behavior

      The cow would panic; Entities would not have difficultly pathfinding while on waterlogged top slabs.

        1. 2019-07-04_14.36.38.png
          2019-07-04_14.36.38.png
          1.32 MB
        2. 2019-07-09_00.05.gif
          2019-07-09_00.05.gif
          2.09 MB
        3. MC-156022.mp4
          7.96 MB

            Unassigned Unassigned
            Wool Grass William Gross
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              Created:
              Updated:
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