Wild!
I never encountered that before, but then again, I'm not really an abstract expressionist......
I'm afraid that I don't have a clue as to what caused that image, maybe something went wrong when entering the files, a mix-up somewhere or a forgotten ";"
I still use ZM, I compared numerous stacks with ZP and ZM and every time ZM's result was better, but with very good optics it might be the other way around.