Forgive me if I'm wrong...But I'm pretty sure this means there is an issue with the head board, rather than the head itself.
In other words, I think the computer is getting confused. Your jet test looks pretty funky, it's almost as if it can't remember how to print one for magenta.
If you have tried swabbing the heads, a 48 hour soak, flushed the lines and replaced the caps...Then there isn't much else you can do apart from assume electrical fault or try a different head.
Does the pattern on the jet test change each time you run it? If it does, I guess it could still be severely misdirected nozzles...And when I say severely, I mean SEVERELY misdirected haha.