The Bug:
Entities' held items no longer follow their arm movements when they have the invisibility effect.
This behavior was introduced in 25w31a.
Steps to Reproduce:
Hold an item in your main hand and give yourself the invisibility effect.
Switch into third person, walk around, and look at the position of your held item.
Observed Behavior:
Entities' held items no longer follow their arm movements when they have the invisibility effect.
Expected Behavior:
Entities' held items would longer follow their arm movements when they have the invisibility effect.
This issue is not exclusive to players; it also affects other entities such as mobs or armor stands.