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.