Cloud like things around player while carrying creatures, performance gets bad

[MickPlayer23]

Expected Behavior

No "clouds" and no lag/extreme slowness

Actual Behavior

When a player picks up a creature (mostly happened with sheeps, cows and chickens, because that's all we did until now), small "clouds" appear around the player holding the creature causing the game to go slower to the player nearby or to the one holding the creature after pressing f5, then goes back to normal when placing the creature down/going back to 1st person. It doesn't happen while holding other players.

Steps to Reproduce

pick up sheep/cow/chicken, see it in 3rd person (with f5 or another player being nearby), clouds appear + everything goes VERY SLOW

Version of Minecraft, Carry On, Forge/Fabric

1- Arclight 1.20.1 // Carry on 2.1.2.7
2- Forge 1.19.2 // Carry on 2.1.2.23

Screenshots encouraged

there can only be seen a few but there's a lot around, and some are a little bigger

[Tschipp]

I have no clue, but this is definitely due to some other mod.