Phoenix FD foam artifacts grid - help

Phoenix FD Foam - Help

Hello. I have had this issue with rendering Foam for phoenix fd ocean sim. and it drives me crazy.
the grid size is 100 mil and each cell is 10cm.
problem I have is the foam, it renders out like bands / grid. and it doesnt matter if I change the alpha, the size or anything that I can think of.
I render them as points as you can see in the screenshot. but this drives me crazy. the front looks good but the back has this artifact.

Seem like it doesn’t matter what grid size I use.