The result of the GPU Sprite effect tutorial doesn't look like the example video


I went through this guide: Create a GPU Sprite Effect | Unreal Engine Documentation .

I tripled-checked to make sure I had exactly the same data everywhere, but somehow my result is far less satisfying. Instead of a nice slow swirl, I have particles bouncing in and out of the center of the particle system.

Is there anything that is maybe not up-to-date in the guide, or some additional changes that are not included in the directions?