Niagara Effect difference between packaged build and editor, probably user parameters related

[NonoDey]

Here are some actors with niagara effect attach to it, and how they are in the editor :

Everything is normal, and how I want them to look.

Then in the packaged version it look like this :

Very different right ?

It seems like the user parameters used on the “Niagara Particle System Component” are simply not used/respected correctly.

Here is the vfx directly, without users parameters and it seems to match the result in the packaged version, minus the color.

Can someone help me, and tell me what is going on ?

[NonoDey]

Okay I found something interesting.

In order to test the loots for my game, I use an Actor to spawn a bunch of others Actors.

I then tried to add directly the loot actor in the scene.
And this one work just fine, while the others are still not ok.

What is going on ?
Why are the user parameters not correctly applyied when using SpawnActor, and only for a packaged build ?