Niagara Mesh Reproduction Sprite issue

I’m playing around with the Mesh Reproduction in Niagara and noticed an issue with the reproduction. I want the effect to only happen on the arms so I just imported my character’s arms as a skeletal mesh. The skeletal mesh itself looks and animates normally, but the reproduction in Niagara seems to catch some of the torso and I’m not sure why. I also brought in the legs for comparison and those reproduce fine, it seems to be unique to the arms. Does anyone know why this might occur?

Niagara VFX on left, skeletal mesh on right