Nekros Shadow of the Dead kill the assassination target doesn't count toward to progress

[nickbananaboy]

Doing the Collect-Credit-then-assassinate-the-target bounty mission, in our squad there's three nekros, and one Mesa.

the assassination target is surely spawned and dead (confirmed mod pickup, and bonus requirement is ticked) But the progress stuck.

High possibility that it's killed by one of the shadow we created (three of us spawn them at the assassinate stage).