RedGiant 3d Stroke Render is Jerky

Hello,

I'm new to AE, trying to learn RG 3d stroke. I'm animating a basic circle, with just a start and end point keyframe + small camera movement (i have the object starting larger and scaling down in perspective.)

As the animation plays, the render is very jerky. Basically the motion does not look smooth as it animates along the path.

Can anyone offer help how to get a smooth motion final render?

Thank you!

-Jessica