Hi Juien,
Thanks a lot for your reply !
I’ve attached the project to this message, let me know if you can see it ?
I’ll try to force load the mesh using a BP node.
As a matter of fact, I was not really a big fan of using ISM for a single mesh indeed 
But I could find any way to create a SM component and setting up the mesh to it as I need to pick up the mesh path from an attribute.
The only thing I could find was the AddComponent node, but I couldn’t set the mesh path from an attribute, only Template editing was available, any pointer on how can I do that ?
And a bit off topic, IMHO having a way to add any type component and being able to set any of their parameters using an attribute would be super really useful ( Like we alreay have on the StaticMeshSpanwer with the “Static Mesh Component Property Overrides” array ).
Cheers,
Guillaume