Yes, you were right.. I did it without using the sparrow and the quest advanced and the boss appeared.. Thank you man...
But I still thinking that there is a bug... Maybe because the time that this DLC came out, we couldnt use the sparrows in mercury and now bungie changed it... So I think they should fix this bug or disable the use of sparrow during the quests of DLC
Sparrows deploying in the over world on Mercury is fairly new, so I’m thinking the sparrows gave something to do with it. At launch of Curse of Osiris, you weren’t able to do this. That’s the only thing that has changed on Mercury.
I know the devs are aware of it, and I have a good feeling that their intent to rework how New Light starts may including fixing bugs that were introduced to the year 1 story lines. So I know it’s on their radar, but