I completed the challenge to shoot all 40 taken eggs expecting to get Harbinger's Echo but it did not drop. I was unaware that an unresolved bug from 2018 would not allow for the sparrow to drop because I shot the eggs taken across multiple characters. I don't know if there is a way to fix this or if it could be directly given to my account, but I'm all ears. Some additional information into the issue is that I can't get it from collections or shoot the eggs on the other characters because if you shoot an egg on one character it's gone on the other two.