Glow Squids reset all NBT when unloaded

Can confirm.

Same here

Using /data get entity @e[type=glow_squid,limit=1] gives this:

Glow Squid has the following entity data: {Brain: {memories: {}}, HurtByTimestamp: 0, Attributes: [{Base: 0.699999988079071d, Name: "minecraft:generic.movement_speed"}], Invulnerable: 0b, FallFlying: 0b, DarkTicksRemaining: 0, PortalCooldown: 0, AbsorptionAmount: 0.0f, FallDistance: 0.0f, DeathTime: 0s, HandDropChances: [0.085f, 0.085f], PersistenceRequired: 0b, UUID: [I; -852183328, -247447012, -1226603591, -688906928], Motion: [0.013942048884928226d, 0.012360158376395702d, 0.030300691723823547d], Health: 10.0f, LeftHanded: 0b, Air: 300s, OnGround: 0b, Rotation: [-35.71885f, 0.0f], HandItems: [{}, {}], ArmorDropChances: [0.085f, 0.085f, 0.085f, 0.085f], Pos: [1136.5999999940395d, 64.66497143893503d, 205.0955783687532d], Fire: -1s, ArmorItems: [{}, {}, {}, {}], CanPickUpLoot: 0b, HurtTime: 0s}

There is no NoAI tag even if it was summoned with it.

I'm pretty sure the cause for this is that GlowSquid#readAdditionalSaveData doesn't call super. Same reason for MC-212325

Other NBTs are glitched as well

can totally confirm by the wiki

@Justin zheng The wiki is not an official source of information

Not every NBT tag is reset. If you summon an invulnerable glow squid, the glow squid will still be invulnerable after a relog.

1. /summon minecraft:glow_squid ~ ~ ~ {Invulnerable:1b}

2. /data get entity @e[type=minecraft:glow_squid,limit=1,sort=nearest] Invulnerable

   The result is 1b and the glow squid does not take damage when you hit it in survival mode.

3. Relog.

4. /data get entity @e[type=minecraft:glow_squid,limit=1,sort=nearest] Invulnerable

   The result is still 1b and the glow squid still does not take damage when you hit it in survival mode.

Yeah, any of the base entity NBT persists, but anything mob-specific is lost

Would also like to add that this causes named Glow Squids to despawn as MC-212915 explains even when named with a name tag