Create a multiple niagara systems for splines in blueprint

Hello,
I’m currently facing an issue with creating multiple Niagara systems for spline components in a Blueprint. I have three spline components (as shown in the attached screenshot), and I’m trying to attach a separate Niagara particle system to each one.

Unfortunately, the particle system only appears on the first spline—nothing shows up on the others. I’ve double-checked the setup, but I can’t seem to figure out what’s going wrong.

If anyone has encountered a similar issue or has any ideas on how to resolve this, I’d greatly appreciate your help. Thanks in advance!