Warzone Bosses Not Appearing in Kill List

Games Halo 5: Guardians
1

I’ve been playing Warzone, and I’ve killed the Hydra Soldier at least two times, yet it hasn’t registered on the list of bosses I’ve killed. Anyone have a guess as to why?

2

[deleted]

3

I know assassinated one of them, and the other I might have assisted in the takedown.

4

[deleted]

5

That is probably the case then. Oh well.