Expected Behavior

Mobs should be moving around, but they only stay and look around. Creepers in my farm sometimes run a from cats.

Actual Behavior

Mobs just stay and look around

Example: Pigs stay and look around.

I cannot reproduce this issue. In singleplayer in specator mode mobs don't move, but that is also in vanilla. When the player is in creative mode the mobs seem to move without issues.

I've been able to reproduce this on my server, by accident. Its very annoying if you have gunpowder and gold farms

Can you give me the farm design (worlddownload, video link, whatever)?

I use the gunpowder one on my server and it works fine, although I'm using latest commits oppose to latest release.

I use aternos so i cant use latest commit. See if you get the bug on latest release.

I could also send the world & modpack download

Gold farm: https://www.youtube.com/watch?v=e8fkpET5fOI

Gunpowder: https://www.youtube.com/watch?v=F73QtCeeQ40

I would download the world and check if it happens with the mods on a local server/singleplayer, Aternos server performance could be causing problems.

This farm does work on a normal vanilla server, ill check the world soon ;)

I tested a cat based creeper farm (very similar to the video) and had no problems.

/player gold spawn at -7.30 250.19 -11.55 facing -90 0
/gamemode survival gold
/summon minecraft:zombified_piglin -4.30 250.50 -11.43
/player gold attack
/tick warp 2000
/player gold kill
/player gold spawn at -7.30 250.19 -11.55 facing -90 0
/gamemode survival gold
/tick warp 20000

Should be able to observe pigmen break aggro, the longer time progresses the more pigmen lose aggro
Tested 1.16.2 with lithium 0.5.2
rayworks gold barter farm.zip

Marking as confirmed as this issue has been reported by multiple players.

Does adding

mixin.ai.goal=false
mixin.ai.nearby_entity_tracking=false
mixin.ai.pathing=false
mixin.ai.poi=false
mixin.ai.raid=false
mixin.ai.task=false

to the lithium.properties resolve the problem?

Upon further testing, this will occur without lithium. Is most likely a vanilla bug then.

Upon further discussion on the Discord and the user update here, this appears to be a problem in vanilla and is not within the scope of Lithium for us to fix.