So I figured out why there is always noise in my seafoam. For some reason, when you have a mask or merge in the breakup chain, it translates to pure noise in the surface layer.
I tried both surface layer with a mask, and merge with a mixer. The mixed or masked in areas are just noise, while in the 2D preview you have the desired result, which is well, not noise. Lol
I'm trying to have smaller seafoam forms on the tall wave displacements and larger, spread out forms on the less displaced areas. I tried to reproduce this in a new file, but was unable to so here is the original file.