I don’t really know how this happened, i got a few tests sims that seemed to work and then? without (to my knowledge) changing anything but simulating at a higher resolution (240), I’m getting this kind of results
Are you using the Beta version of Blender 2.8? This looks like a bug that was caused by a change in Blender 2.8 during the beta. I would suggest using the latest version of the addon and the official release of Blender 2.80 or 2.81 that fixes some bugs that can affect the FLIP Fluids addon: https://www.blender.org/download/releases/2-80/