I have a simple wave tank in which I'm dropping a boat. The water is working perfectly and the whitewater works for both foam and bubbles. But for some reason the spray is not colliding with the boat. You can see it in the tail of the boat. I've verified using the color visualizers and it is only the spray that is not working.

I'm using volume collisions but I have not generated it by hand. It gets generated every time I re-simulate. I've tried reducing the height of the drop, the intensity of the waves and 20 subsamples but none of it fixed the problem.

I'm caching the water and the boats movement first and then simulating the whitewater. I'm caching the big .sim files for the water.

I also found a bunch of posts on forums of people having the same issue with no clear solution to the problem.
https://www.sidefx.com/forum/topic/38715/?page=1#post-177225 [www.sidefx.com]
http://forums.odforce.net/topic/26784-spraywhitewater-collision/ [forums.odforce.net]