This is the second time this happened to me. Participated in the battle, but did not get the "response to precious courage" item that I need to complete my season pass.

You need to actually hit it sucessfully. If you have low accuracy, and miss the ability, you don't get kill credit.

Thanks for the reply, but I was defenitly hitting him. I saw the "Critical" message popping up several times.

At any rate, I finally got credit tonight so problem solved.