Squid {NoAI: 1b} don't move but are affected by gravity

Summoning an Squid with custom NBT-data like so:
"summon Squid ~ ~-2.5 ~

{Invulnerable: 1b,NoAI: 1b}

"
creates a Squid that does not move in water, unlike a Villager with

{NoAI: 1b}

it is however still affected by gravity.
This also affects item_entity and XPOrb_entity. For those two

{NoAI: 1b}

seems to have no effect at all.