ShulkerBullet cannot target AreaEffectCloud.
Explication:
When using
/summon ShulkerBullet ~ ~3 ~ {Steps:1,Target:{X:10,Y:4,Z:10,L:1l,M:1l}}
with the correct coordinates and the correct UUID, you can summon a SulkerBullet targeting the entity written in {X,Y,Z,L,M}.
But if the entity is AreaEffectCloud, it doesn't track it. It works for other entities.
How to recreate:
1-Do
/summon Creeper 10 4 10 {UUIDLeast:1l,UUIDMost:1l,NoAI:1} (near x:10 y:4 z:10)
2-Do
/summon ShulkerBullet ~ ~3 ~ {Steps:1,Target:{X:10,Y:4,Z:10,L:1l,M:1l}}
The shulkerBullet should target the creeper
3-Kill the Creeper
4-Do
/summon AreaEffectCloud 10 4 10 {UUIDLeast:1l,UUIDMost:1l,NoAI:1,Duration:10000000}
It's like when you summon the Creeper, but now it's an AreaEffectCloud
5- Do
/summon ShulkerBullet ~ ~3 ~ {Steps:1,Target:{X:10,Y:4,Z:10,L:1l,M:1l}}
The ShulketBullet should not track it.
Thanks for your comprehension, comment for help if needed.
Confirmed for
15w37a But might be intended
There are multiple entities that are not targeted, for example FallingSand or ItemFrames