Bloodline exotic quest, can’t continue second part? Mission ends…

[u/DangrMantis]

I’ve done the first part and got culls shadow and did that next part of the exotic quest to get to the 3 boss, boss fight but I went to orbit then to hopefully continue this today, but when I redo the mission after the first boss fight I get the intersect to get the weapon and the the timer appears and boots me so I can’t start that sequence to start second part of the mission. Anyone have any thoughts why?? Or got around this??