Mobs will not path off the top of damaging blocks in many cases. They appear to view the 8 blocks surrounding a cactus, magma block, or campfire as damaging, and therefore will not path to them if they have
"avoid_damage_blocks": truewithin "minecraft:navigation.walk". That means they will not leave the top of a damage block if it is elevated, unless they target something farther away than 1 block. For example, if you spawn a wolf on a cactus, magma block, or campfire, and a sheep next to the block, the wolf will get angry but will not move until the sheep begins to wander away. Moreover, the panic behavior seems to be restricted to targeting adjacent blocks, so mobs with "minecraft:behavior.panic" (e.g. llamas, chickens) will not step down from a cactus as they should because they can’t find a “safe” block.
Steps to reproduce
Place a cactus block on sand.
Summon a mob on top of the cactus.
Expected result
The mob moves off of the cactus because it is getting hurt!
Actual result
Most mobs will not path off of the cactus.
Linked issues
discovered while testing
is duplicated by
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[Mojang] Mega_Spud (Jay)
Thank you for your report!
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GoldenHelmet
Still occurs in 1.17.11 Hotfix.
Another issue caused by this bug, is that mobs can get trapped between 2 damage blocks. For example, on sand place 2 cacti with a 1-2 block soace in between them, and spawn a chicken in that gap. It will never move on its own. A baby chick will not move from that spot to follow an adult, a wolf will not move from that spot to attack a sheep, etc.
These wolves want to eat the sheep but feel it’s unsafe to move away from the cactus:
[media]
this happens to me a lot. Whenever I am fighting some piglins in the nether, and I lead them into a fire, they just jump around in the fire and don't even try to get out.