Zombie nautilus is still neutral even while ridden by drowned

If a zombie nautilus is being ridden by a drowned, it does not perform its dash attack at the player until it has been damaged. While the zombie nautilus does move towards the player in a hostile manner, it not attacking makes it still neutral, despite its hostile rider and the 25w41a changelog stating “Zombie Nautilus is hostile while ridden by a hostile mob”.

To observe in game:

1. Spawn a zombie nautilus ridden by a drowned ( /summon zombie_nautilus ~ ~ ~ {Passengers:[{id:"minecraft:drowned",equipment:{mainhand:{id:"minecraft:trident",count:1}}}]} )

2. Swim around it in survival, see how it moves towards the player but lacks a dash

3. Attack the zombie nautilus, see how it immediately dashes and continues to afterwards