Born in Darkness completely missing on my Titan - I can't complete my subclass at all

I've searched the internet high and low, and cannot find a solution to this.

• I have completed it on my Warlock
• I am halfway through completing it on my Hunter
• It is completely gone on my Titan
• Elsie doesn't have anything for me
• The old quest terminal in the Tower doesn't have anything for me
• I have collected all 9 Entropic Shards

I have seen numerous posts about this but not one definitive solution. Any ideas?