Minecraft wiki entry for Invisibility, associated text: Any armor worn (including horse armor worn by horses)
Held items
Entities set on fire
Any arrows stuck in players ‌[Java Edition only]
Any particles being emitted
A shulker head
A llama's carpet decoration
A saddle if equipped on a mob for riding
The aura of a charged creeper
The eyes of cave spiders, spiders, endermen, and phantoms
Emerald above villager's or wandering trader's heads when opening their trading GUI‌[BE & EE only]