Flipbook Motion vectors stuttering


I am trying to use the flipbook motion vector with an explosion exported from houdini using sidefx labs tools. I followed a couple tutorials and I am pretty sure I got the motion vector intensity setting right and everything else. But for some reason it is stuttering really badly. My explosion (in real time) is pretty fast moving. Maybe its moving too fast and it is only 24 frames a second? If you notice, toward the end of the flipbook, it starts to stop stuttering when the explosion is moving slower at the end. That’s why I was wondering if its maybe I just need a slower explosion or just a higher frame rate atlas, like 60 instead of 24. Any thoughts?