Entities bob their head up and down when targeting towards the player

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.