Well, i can't actually show a video of them, since my PC is too crappy for it.
The bug: Animals will start "vibing" to the item you are suposed to give them, that is, bump their head up and down when you have their breeding item on your hand.
How to reproduce:
1: Get some mobs, in my case, chickens and cows.
2: Get their breeding item
3: Hold them on your hand
4: watch them vibing, or asking desesperatelly for you to breed them. What did i just say?
This happened after i updated from a 21w38a world, but i don't think this even changes anything.
Linked issues
is duplicated by 8
MC-237977
Some animals' heads keep moving if you tempt them with food.
Resolved
MC-237979
Animal mobs that see food they want begin bobbing their heads uncontrollably
Resolved
MC-238007
Mobs have trouble looking at player when agro'ed
Resolved
MC-238035
mobs weird head bob when locked to player
Resolved
MC-238087
pig and carrot
Resolved
Attachments
Comments 15
Can confirm it happens for me on both an upgraded world and a newly generated world, on most passive mobs and hostile mobs
Fresh 21w39a world. Behavior confirmed for Cows, Sheep, Chickens and Rabbits when holding breeding item. Creepers as well when targeted on player. Does not seem to affect Skeletons or Zombies/Drowned.
since I have access to it
This is, and you know it; Mojang hasn't released it yet (to anyone) as it's not build yet.
michael
Also noticed this bug when in a cave with hostile mobs attempted to pathfind to me, in a world upgraded from 21w38a. Pathfinding itself seems fine. Tested again in a superflat world created in 21w39a and the glitch still occurs. Affected mobs include just about all passive mobs that follow the player using breeding items (as far as I can tell) as well as Creepers, Spiders, Ravagers, and most illagers. Goats don't do this even when a player is holding Wheat. Zombies (incl. Zombified Piglins) and Skeletons don't exhibit this bug either, even though they seek out the player. Hoglins and Piglins also don't seem to experience the bug. Tried to check Endermen, but their shaking when enraged makes it impossible to tell.