In a Zombified Piglin Farm, Zombified Piglins spawn in places they shouldn't.

[mangocraft]

Expected behavior

Zombie Piglins will only fall from the Hell Gate into the Death Passage and be killed normally, instead of some monsters jumping out of nowhere.

Observed/Actual behavior

Zombified Piglins will spawn in places around the farm, such as in water, outside the execution platform

Steps/models to reproduce

1. Build a regular Zombie Piglin Farm and start it
2. Wait 5-10 minutes

Plugin and Datapack List

[22:51:34 INFO]: - HuskHomes, HuskSync,
[22:51:34 INFO]: - BetterRTP Chunky, CMILib
Essentials, EssentialsSpawn, GSit, LuckPerms, PAPIProxyBridge, PlaceholderAPI
PlayerChat, PlayerTitle, ProtocolLib, QuickShop-Hikari, Residence, Vault, WorldEdit

Folia version

Luminol version 1.21.4-DEV-dev/1.21.4-hardfork@efd5589

Other

No response

[cegou121]

This kernel is not monitored by the PaperMC Team

[mangocraft]

this bug can be reproduced under the latest folia（4e7607d）

…

------------------ Original ------------------ From: De1fy ***@***.***> Date: Sat,Jan 25,2025 8:03 PM To: PaperMC/Folia ***@***.***> Cc: YIIYI ***@***.***>, Author ***@***.***> Subject: Re: [PaperMC/Folia] In a Zombified Piglin Farm, Zombified Piglinsspawn in places they shouldn't. (Issue #320) This kernel is not monitored by the PaperMC Team — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[MsEDok]

also notice that 2d goldfarm there sometime piglin walkign aroudn the area outside the killchamber

But it could just be a vanilla feature

https://minecraft.wiki/w/Zombified_Piglin#Reinforcements

This feature is exclusive to Java Edition.
On hard difficulty, zombified piglins have a 5% chance to spawn as leaders. Leader zombified piglins can spawn other zombified piglins as reinforcements.

[mangocraft]

also notice that 2d goldfarm there sometime piglin walkign aroudn the area outside the killchamber

But it could just be a vanilla feature

https://minecraft.wiki/w/Zombified_Piglin#Reinforcements

This feature is exclusive to Java Edition. On hard difficulty, zombified piglins have a 5% chance to spawn as leaders. Leader zombified piglins can spawn other zombified piglins as reinforcements.

After observation, not only zombie piglin farms, but other monster farms may also appear. It will not appear in vanilla

[almecho]

If this isn't a vanilla feature, then it's not a Folia issue specifically and it's something upstream in Paper as we're also seeing this on Paper version 1.21.4-117-main@a35cfe9.

Will get our server upgraded to the latest hard fork build to see if it's still occurring & try it in vanilla just for good measure before reporting it to the Paper team.

[Warriorrrr]

also notice that 2d goldfarm there sometime piglin walkign aroudn the area outside the killchamber

But it could just be a vanilla feature

minecraft.wiki/w/Zombified_Piglin#Reinforcements

This feature is exclusive to Java Edition. On hard difficulty, zombified piglins have a 5% chance to spawn as leaders. Leader zombified piglins can spawn other zombified piglins as reinforcements.

After looking at this other related issue (PaperMC/Paper#12057). this looks to be the case to me, this is not a bug.