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
Run the following command:
/fill ~10 ~-1 ~10 ~-10 ~-1 ~-10 minecraft:cut_copper_slab[waterlogged=true,type=top]Summon a cow on top of the cut copper slabs
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.
Linked issues
is duplicated by
MC-158278
Skeletons and Creepers' behavior on waterlogged top slabs
MC-158419
Mob AI Bugs out on Waterlogged Upside-down Half-Slabs
MC-158837
Chickens spin in circles when on slabs
MC-160266
wandering trader spinns on slab blocks
MC-161091
Villager spinning in solo too
MC-164077
Mobs Constantly Spin And Get Stuck On Waterlogged Slabs
MC-182151
waterlogged upper slabs accelrate skeletons to insane speeds
MC-226641
Goats will not attempt to ram entities on waterlogged top slabs
Attachments
Comments
migrated
migrated
Affects 19w38b
migrated
Affects 19w42a
migrated
Affects 20w12a
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Affects 20w13a.
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Affects 20w13b
migrated
still present in 20w16a
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If there's carpet on top of the waterlogged halfslap, it completely stops the mobs pathfinding and they will stand completely still.
migrated
I'm not able to reproduce this any longer in snapshot 20w20a.
[Mod] LateLag
Can someone else confirm that it's no longer occurring?
migrated
I still see this on 1.16.4. It also seems to prevent villagers from breeding or using a work block
Hostile mob pathfinding: https://www.youtube.com/watch?v=UweKHv-XSn8
Avoma
In that video, you were using Optifine, therefore making your statement invalid. I can confirm that this issue no longer occurs in 20w51a. Mobs have no trouble pathfinding over waterlogged upper slabs.
[Mod] LateLag
Can confirm that some part of it still occurs. They can move just fine, but they might start spinning randomly.
Avoma
Can confirm in 1.17.
Avoma
Can confirm in 1.17.1.
Avoma
Here are some steps on how to go about reproducing this. I've also attached a video demonstrating this issue.
[media]The Bug:
Entities have difficultly pathfinding when standing on waterlogged top slabs.
Steps to Reproduce:
Summon some waterlogged top slabs beneath you.
/fill ~10 ~-1 ~10 ~-10 ~-1 ~-10 minecraft:cut_copper_slab[waterlogged=true,type=top]Summon a cow on top of the slabs.
Attack the cow and watch its behavior closely.
Take note as to whether or not the cow panics upon being attacked.
Observed Behavior:
Entities have difficultly pathfinding when standing on waterlogged top slabs.
Expected Behavior:
Entities would not have difficultly pathfinding when standing on waterlogged top slabs.
Avoma
Can confirm in 1.18.1.
Avoma
Can confirm in 1.18.2.
migrated
I can confirm in 23w05a
migrated
In 23w32a
There's also an issue with hostile mob pathfinding to a player who is standing on waterlogged top slabs, where they take an unnecessarily long path to them instead of a direct one
himazinn_Japan
Can confirm in 24w45a.
Minecraft386882
Confirmed in 1.21.3
Confirmed for 19w34a