I've met few new players recently asking for helping of clearing the defeating prosecutor task junction thing.
I even lead them to multiple runs and encountered few prosecutors watching them melee killing the prosecutor, but ends up the junction still written 0/1 unfinished for them.
One of the new players is using wukong iron staff to whack the prosecutor and killing it by himself(No environment stuff over there or any damage sources touching the prosecutor)
All doesn't work. Please take a look of this bug.