Officer on Deck bugged for a friend (XBOX)

I recently got a friend into Fallout 76 and he's trying to complete the Officer on Deck mission so he can join in me in the Silos but for some reason he's not getting any promotions. We've killed plenty of Starred enemies and he's even been around to help kill Scorchbeast Queens and it has remained at 0/10 for his progress. At first we thought maybe he had to get the final blow but after watching him do so it still hasn't updated. Is there a way to fix this?

Edit: turns out E-Events and starred enemies didn't work but scorchbeasts did so we got it done.

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